security: Add common boot media write protection

Introduce boot media protection settings and use the existing
boot_device_wp_region() function to apply settings on all
platforms that supports it yet.

Also remove the Intel southbridge code, which is now obsolete.
Every platform locks the SPIBAR in a different stage.
For align up with the common mrc cache driver and lock after it has been
written to.

Tested on Supermicro X11SSH-TF. The whole address space is write-protected.

Change-Id: Iceb3ecf0bde5cec562bc62d1d5c79da35305d183
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32704
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>

0 files changed, 0 insertions, 0 deletions