Commit e2f88dfd ("libfdt: Introduce new ARCH_FIXUP_FDT option")
allows us to skip memory setup of DTB, but a problem for ARM is that
spin_table_update_dt() and psci_update_dt() are skipped as well if
CONFIG_ARCH_FIXUP_FDT is disabled.

This commit allows us to skip only fdt_fixup_memory_banks() instead
of the whole of arch_fixup_fdt().  It will be useful when we want to
use a memory node from a kernel DTB as is, but need some fixups for
Spin-Table/PSCI.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NAlexey Brodkin <abrodkin@synopsys.com>
Acked-by: NSimon Glass <sjg@chromium.org>
Fixed build error for x86:
Signed-off-by: NSimon Glass <sjg@chromium.org>

At present sandbox exits when the 'bootm' command completes, since it is not
actually able to run the OS that is loaded. Normally 'bootm' failure is
considered a fatal error in U-Boot.

However this is annoying for tests, which may want to examine the state
after a test is complete. In any case there is a 'reset' command which can
be used to exit, if required.

Change the behaviour to return normally from the 'bootm' command on sandbox.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NTeddy Reed <teddy.reed@gmail.com>

Add dummy bootz_setup implementation allowing the u-boot sandbox to
run bootz. This recognizes both ARM and x86 zImages to validate a
valid zImage was loaded.
Signed-off-by: NSjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: NSimon Glass <sjg@chromium.org>

Follow the convention of other architectures and move the platform
specific linux bootm code into sandbox/lib/bootm.c.
Signed-off-by: NSjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: NSimon Glass <sjg@chromium.org>