chromeos: fix build breakage when !CHROMEOS_RAMOOPS

Needed types were being guarded by CONFIG_CHROMEOS_RAMOOPS.
Expose those unconditionally.

BUG=None
BRANCH=None
TEST=None

Change-Id: Ie858c746307ad3669eab5c35bf219e1a58da2382
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/188714
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/5453
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>