Hook up MRC cache update

Requirements:
  - must be in ramstage (locking flash while executing code from there
    might not work)
  - must be after cbmem is reinitialized (so the mrc cache copy of the
    current run can be found)

Change-Id: I8028fb073349ce2b027ef5f8397dc1a1b8b31c02
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/1002
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
4 files changed