If the variable `mirror_flag_attempts` isn't accessible, or doesn't
have a value, don't attempt to mirror the EC.
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ia39b2ce4ffcb8db3a335449c8bdb0d5c8a28a52c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76581
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>