dummyflasher: fix propagation of register_*_master() return values

This patch checks return value of register_*_master()
so that in case of an error this error is not ignored anymore.

Change-Id: I3a7eeb3cdd814db18b0717ae8b40ecadb4c32f7c
Signed-off-by: Alexander Goncharov <chat@joursoir.net>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/72430
Original-Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/73477
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
1 file changed