drivers/intel/fsp2_0: Add simple reset handler

Any FSP API call may request a reset. This is indicated in API function
return code. Add trivial reset handler code.

BUG=chrome-os-partner:54149
BRANCH=none
TEST=none

Change-Id: Ieb5e2d52ffdaf3c3ed416603f6dbb4f9c25a1a7b
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/15334
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed