Move EC FW from a CBFS file to an FMAP entry and rename the EC signature
section to EC_SIG.
An offset of (16M - 512K) was chosen to line up the EC FW before the
RW_MRC_CACHE.
Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: I9b19d92043790b10acd20fbfdf394d5bd67b8295
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70695
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
75e720bf02