x86, crash: Unify ifdef

Merge two back-to-back CONFIG_X86_32 ifdefs into one.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1394633584-5509-3-git-send-email-bp@alien8.de


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>