Clean up by using is_devfn_enabled().
Change-Id: I9ea3d8b1b18e84a75a81a7e926d2c638766bb493
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82120
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>