sb/intel/common: Make RCBA manipulation MACROs common

No Change in BUILD_TIMELESS.

Change-Id: I634526269d45ebdc6c31cdc28d9ec846b397211d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/27041
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
3 files changed