src/northbridge: Capitalize CPU, RAM and ROM

Change-Id: I5aa27f06f82a8309afb6e06c9e462e5792aa9986
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15940
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
26 files changed