baytrail: cache ROM space early in bootblock

Take advantage of the cache early in bootblock. The
intent is to speed up cbfs walking when trying to locate
romstage.

BUG=chrome-os-partner:22857
BRANCH=None
TEST=Built and booted.

Change-Id: If03210103c9782390230915db3b4a9759d172dce
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170426
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
1 file changed