sandy/ivy: Fix mrc.cache file in CBFS

The file was not recreated when configuration changed. One would
hit this bug when turning CHROMEOS on/off.

Also do not create mrc.cache with CHROMEOS at all.

Change-Id: I5b0ecde66589396b24967ce289bf65e20bb08825
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5211
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
1 file changed