soc/intel/xeon_xp: Combine cpx and skx acpi.c
Prepare for common ACPI. Combine cpx and skx acpi.c into a single
file in xeon_sp. This is almost the last step in using common/block
acpi.
Change-Id: I5f40eb7909bb796907682c548219c7515f2ae4d1
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46600
Reviewed-by: Jay Talbott <JayTalbott@sysproconsulting.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>