soc/intel/common/nvm: Allow overriding to_flash_offset() function
On apollolake, the flash is memory-mapped differently, and the default
MMIO to flash calculation does not produce correct results. While the
long-term solution is to rewrite the NVM functionality to keep the
flash offset as part of its context, as a temporary measure, allow
overriding the to_flash_offset() function by declaring it weak.
Change-Id: Ic54baeba2441a08cfe1a47e235747797f6efb59b
Signed-off-by: Alexandru Gagniuc <alexandrux.gagniuc@intel.com>
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14247
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>