internal.c: unify the macro for x86 only code

The #if defined(__i386__) || defined(__x86_64__) guard is commonly used
for x86 only code across flashrom.
Only platform.h and hwaccess.* use the IS_X86 macro.

Change-Id: I94a599431f58666189c8cd601286e9b30c8bf62b
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.de>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/57942
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Original-Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71426
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed