intel/fsp1_0: Allow the MRC cache to live in a FMAP region

The new option CONFIG_MRC_CACHE_FMAP will cause fastboot_cache.c to
look in the FMAP for a region named "RW_MRC_CACHE" and prevents adding
a CBFS file named "mrc.cache".

Tested on a fsp_baytail-based board.

Change-Id: I248f469c7e3447ac4ec7be32229fbb5584cfd2ed
Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Reviewed-on: https://review.coreboot.org/13632
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: York Yang <york.yang@intel.com>
3 files changed