kexec does infact work and build on powerpc, enable the compatible
host for these machines
(From OE-Core rev: 1ccc1ec56bc50cee121c03ae8bb8ccacd32b8560)
(From OE-Core rev: c7afacf05deb8ca77818aa33ee13ec3a8c5d983f)
Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>