This patch is the same as 6c22c59137,
but for x86-64 targets which exhibit the same problem.
Qemu update from 1.2 to 1.4 now allows for 16bit depth in guests,
whereby previously only 32bit depth was supported. However,
the new support is broken, so we force 32bit depth in all cases.
(From OE-Core rev: 6719400533453d0df482ef6e7bb347491e8a3e2b)
Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>