Merge remote-tracking branch 'remotes/dgibson/tags/submodule-update-20170303' into staging

submodule updates (SLOF & dtc) 2017-03-03

This set of patches updates the SLOF and dtc submodules for qemu-2.9.

The SLOF update could have gone in my ppc pull request earlier today,
but I forgot it.  It should be safe to apply in either order with that
set though.

The dtc (and libfdt) update brings us up to dtc 1.4.3 which includes
some things that will be useful in future.

# gpg: Signature made Fri 03 Mar 2017 06:29:31 GMT
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/submodule-update-20170303:
  Update dtc submodule to v1.4.3
  pseries: Update SLOF firmware image
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

dtc @ fa8bc7f9

-Subproject commit ec02b34c05be04f249ffaaca4b666f5246877dea
+Subproject commit fa8bc7f928ac25f23532afc8beb2073efc8fb063

pc-bios/README

@@ -17,7 +17,7 @@
 - SLOF (Slimline Open Firmware) is a free IEEE 1275 Open Firmware
   implementation for certain IBM POWER hardware.  The sources are at
   https://github.com/aik/SLOF, and the image currently in qemu is
-  built from git tag qemu-slof-20161019.
+  built from git tag qemu-slof-20170303.
 
 - sgabios (the Serial Graphics Adapter option ROM) provides a means for
   legacy x86 software to communicate with an attached serial console as

SLOF @ 66d250ef

-Subproject commit efd65f49929d7db775b26066d538c8120ae3db94
+Subproject commit 66d250ef0fd06bb88b7399b9563b5008201f2d63