Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](https://github.com/tensorflow/tensorflow/compare/v2.5.0...v2.5.1)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-type: direct:production
...
Signed-off-by: Ndependabot[bot] <support@github.com>
Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

This reverts commit 1ca28598, reversing
changes made to b703c9f9.

Revert created with the following command:
```
git revert 1ca28598 -m 2
```

With https://github.com/tensorflow/tflite-micro/pull/337 we can now run these targets via a bazel build.

BUG=http://b/186676432 and http://b/174680668

And restore -layering_check to a few places where it got removed with https://github.com/tensorflow/tflite-micro/pull/435/

BUG=http://b/177257332

* Fix misc formatting and spelling errors.

* Re-enable layering check.
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Build all the benchmarks as part of a `make build` command.

* Build benchmark as part of `make build`.

BUG=http://b/197017812

* Fix the build

* Add a separate `make build` to the CI scripts.

Change path to person detect model header file from example directory to
where it is downloaded.

* Update the download script for TFLite Micro person detection example

* Update the download script for TFLite Micro person detection example

Moving forward, TFLM support for Arduino is going to be maintained in a
stand-alone repository at:
https://github.com/tensorflow/tflite-micro-arduino-examples

BUG=http://b/193823889

* Add files from TfLite

Added batch_matmul.h and tensor_utils_common.h that are needed for the BATCH_MATMUL operator.

* Arduino library creation for CI build.
Issue# 256

* fix bug with include file path flattening

* fix examples path generation

Some files in examples source and headers list are not in the examples directory.  They can be tensorflow files or third-party files.  The code is corrected so that these files end up inside the generated directory tree.  Previously, these files were being placed outside the generated directory tree and were thus invisible to follow-on targeted generation scripts.

* remove/revert files that go into the arduino-examples repo

* Format with:

```
tensorflow/lite/micro/tools/ci_build/test_code_style.sh --fix_formatting
```

* request changes to PR

* Removed symbolic link for micro_speech example from Makefile.
Added additional include flags to Makefile.
Adjusted header file transformations during base tree creation.
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>
Co-authored-by: NAdvait Jain <advaitjain@google.com>

On commit 5c7c11e of the tensorflow repo at
tensorflow/lite/micro/tools/make/Makefile:664, MICROLITE_CC_SRCS contains
MICROLITE_CC_KERNEL_SRCS. In the new tflite-micro repo, it does not contain
MICROLITE_CC_KERNEL_SRCS. This commit adds MICROLITE_CC_KERNEL_SRCS to
tensorflow/lite/micro/examples/hello_world/zephyr_riscv/Makefile.inc
so that the generated Zephyr CMakeLists.txt doesn't miss these files.

Similar fix made to corresponding file for magic_wand sample.
Signed-off-by: NLauren Murphy <lauren.murphy@intel.com>
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Groundwork to enable python format checks (via yapf) as part of the CI.

With this change:
 * we are set up to use yapf as part of the docker container
 * pigweed patch is updated to use the google Python style (pep8 with indent of 2 spaces)
 * some documentation updates.

The code still needs to be formatted, and then the Python formatting check will be turned on as part of ci.

BUG=http://b/194404216

* Format all the code.

Once this change is merged, we will turn on Python formatting check as
part of the CI.

* minor formatting update.

BUG=http://b/193437031

* Check for the case where the Operators vector in a tflite model is missing

Some of our tools remove the vector if it's empty (i.e. the subgraph doesn't contain ops). The check is added until the tools are fixed.

BUG=http://b/192589496

* Move NumSubgraphOperators to flatbuffer_utils.h/cc

* Fix the CI errors.

* Remove `#define FLATBUFFERS_LOCALE_INDEPENDENT 0`

We will handle that via the Makefile instead.

* Add  -DFLATBUFFERS_LOCALE_INDEPENDENT=0 to makefile.

* remove references to flatbuffer from kernel_utils.cc/h

* Fix the build.

* run buildifier
Co-authored-by: NAdvait Jain <advaitjain@google.com>
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Separate core, kernel and third party objects.

Add a second optimization level in the Makefile to enable different
levels between kernels and the rest of the TFLM code. This results in a
smaller binary with minimal performance impact compared with using a
single optimization level.

Allows the use of implicit patterns to compile all sources, choosing
different flags for core, kernel and third party sources.

The following measurements are taken using the hexagon toolchain +
hexagon-size and hexagon-sim.

For the keyword benchmark using -O2:
   text    data     bss     dec
  58140   37639   46612  142391

  Cycles: 1700364

For the keyword benchmark using -O2 for kernels and -Oz for framework:
   text    data     bss     dec
  52796   37623   46612  137031

  Cycles: 1759664

* Make the optimization level log an error.

Remove OPTIMIZATION_LEVEL setting for bluepill since core framework now automatically is compiled with -Os.

* Remove section that builds bluepill with -Os since default uses -Os.

* Disable -Werror=vla in order to pass stm32 bare lib presubmit.

* Chnage order so that -Wno-vla takes priority over -Wvla
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Revert "Revert: PR #48758: TFLM: Remove uint8 support for CMSIS-NN kernels"

This reverts commit 6d8a184710164c7bcc41d3bd29fe4ef46836b6c9.

* TFLM: Increase stack size for bluepill

Change-Id: Ie278c6fff55cc620104c69167273a92a2d8e639a

* Update PPD unit test

* Remove leftovers from when PPD supported dynamic output dimensions.
* Correct number of output elements.
* Correct number of input elements for last unit test.

Change-Id: I66fd36d7eb48816986450033bc83c6b240d559b6

* Revert "TFLM: Increase stack size for bluepill"

This reverts commit c7fc2a0e0f16d2ab10c44389033822503c178e69.

With the fix to the PPD unit test from
6e39d12d7688143bd17acb2c5d422385baef9e0f, increasing the bluepill stack
size should not be necessary.

* Fix circular buffer formatting.

The CI check for clang-format needs to be fixed.
Co-authored-by: NAdvait Jain <advaitjain@google.com>
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Revert "Disable currently failing test to make the Xtensa build green. (#124)"

This reverts commit 20cdd3fb.

* Cherry pick https://github.com/tensorflow/tensorflow/pull/50072

* clang-formatting fix.

* Disable currently failing test to make the Xtensa build green.

BUG=https://github.com/tensorflow/tflite-micro/issues/123

* excluded some additional tests that were failing for Hifi5 and Vision P6.

* formatting fixes.

These are part of an already merged PR. We do not have proper checks for
the formatting as part of the github actions and hence these were only
caught by my local git hooks.

Bug: http://b/184876027

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](https://github.com/tensorflow/tensorflow/compare/v2.4.0...v2.5.0)
Signed-off-by: Ndependabot[bot] <support@github.com>
Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

The corresponding change in upstream TF is: https://github.com/tensorflow/tensorflow/pull/48809

Bug: http://b/184884735

Confirmed that the following command passes:
```
./tensorflow/lite/micro/tools/ci_build/test_all_new.sh GITHUB_PRESUBMIT
```