mainboard/artecgroup: Use C89 comments style & remove commented code

Change-Id: Ia1e7f558bbc44001358339a522e59a2ef7c420fb
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16923
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
2 files changed