Default it to no to be consistent with the other architecture wide options
(endianness), and turn it on explicitly for x86 and PowerPC.
Change-Id: Idda26d580156bbbf08ea11b28abe75cfa6b594b2
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2658
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>