This patch allows an arch/ppc kernel to be booted by just passing 1 or 2
arguments to bootm.  It removes the getenv("disable_of") test that used
to be used for this purpose.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jon Loeliger <jdl@freescale.com>

If a Multi-Image file contains a third image we try to use it as a
device tree.  The device tree image is assumed to be uncompressed in the
image file.  We automatically allocate space for the device tree in memory
and provide an 8k pad to allow more than a reasonable amount of growth.

Additionally, a device tree that was contained in flash will now automatically
get copied to system memory as part of boot.  Previously an error was
reported if one tried to boot a device tree that was in flash.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

(Conflicts between Jon Loeliger's and Matthew McClintock's tree
 were resolved by in favour of Jon's version.)

When CONFIG_OF_FLAG_TREE is set, the compiler complains that 'len' in
do_bootm_linux() may be uninitialized.  There is no possibility in the
current code that len will get used uninitialized, but this fix follows
the existing convention of setting both len and data to zero at the same
time.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

Signed-off-by: Matthew McClintock <msm@freescale.com>

Make it possible to generate AVR32 uImage files with mkimage and
make cmd_bootm recognize them.
Patch by Haavard Skinnemoen, 22 Sep 2006