media: rcar-vin: Remove explicit device availability check

The fwnode is retrieved using fwnode_graph_get_endpoint_by_id() without
the FWNODE_GRAPH_DEVICE_DISABLED flag set. So there is no need to
explicitly check if the fwnode is available as it always will be when
the check is performed, remove it.

Signed-off-by: Niklas Söderlund <[e-mail]>
Reviewed-by: Jacopo Mondi <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/rcar-vin/rcar-core.c

···
 		goto out;
 	}
 
-	if (!of_device_is_available(to_of_node(fwnode))) {
-		vin_dbg(vin, "OF device %pOF disabled, ignoring\n",
-			to_of_node(fwnode));
-		ret = -ENOTCONN;
-		goto out;
-	}
-
 	asd = v4l2_async_nf_add_fwnode(&vin->group->notifier, fwnode,
 				       struct v4l2_async_subdev);
 	if (IS_ERR(asd)) {