src/mainboard: Capitalize ROM, RAM, CPU and APIC

Change-Id: Ia1f24d328a065a54975adde067df36c5751bff2d
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15987
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
126 files changed