irda: Use genl_register_family_with_ops()

Use genl_register_family_with_ops() instead of a copy.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Cc: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>