cbmem_find is not available in every stage. Remove usage of cbmem_find() and use GEN_PMCON1 always. BUG=NA TEST=Booting Embedded Linux on Facebook FBG-1701 Change-Id: Id97d57864b3e241e8f046d9b1caebdce199a46b1 Signed-off-by: Frans Hendriks <fhendriks@eltan.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32724 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>