In case of no IRQ resource associated to the bcm_device, requesting
IRQ should return an error in order to not enable low power mgmt.
Signed-off-by: NLoic Poulain <loic.poulain@gmail.com>
Reported-by: NIan Molton <ian@mnementh.co.uk>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>