stoneyridge: Enable IO CF9 in bootblock

If IO CF9 is not enabled, hard_reset() won't do anything in bootblock or
verstage.

BUG=b:110817463
TEST=built on grunt and made sure that hard_reset() reboots.

Change-Id: I5f091077a17db3dfe5b8e8367163312db6828360
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27267
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed