kexec, x86: add boot header member for version 2.12

will use ext_ramdisk_image/size, and xloadflags to put
ramdisk and bzImage high for 64bit.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Simon Horman <horms@verge.net.au>
1 file changed