writeprotect.h: add structure to represent chip wp configuration bits

Add `struct wp_bits` for representing values of all WP bits in a chip's
status/config register(s).

It allows most WP code to store and manipulate a chip's configuration
without knowing the exact layout of bits in the chip's status registers.

Supporting other chips may require additional fields to be added to the
structure.

Tested: flashrom --wp-{enable,disable,range,list,status} at end of patch series

Change-Id: I17dee630248ce7b51e624a6e46d7097d5d0de809
Signed-off-by: Nikolai Artemiev <nartemiev@google.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/58478
Original-Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/70967
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed