soc/intel/broadwell: implement spi_flash_ctrlr_protect_region()

Implement the spi controller flash_protect() callback. No need to
have a global spi_flash_protect() once implemented.

BUG=b:69614064

Change-Id: I83f4310d8f78ba64727ba75eb75708d0cbaa7d53
Signed-off-by: Aaron Durbn <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/22882
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
2 files changed