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>