media: usb: as102: drop as102_dev NULL check

Fixes this smatch warning:

drivers/media/usb/as102/as102_usb_drv.c:306 as102_usb_release() warn: can 'as102_dev' even be NULL?

And indeed, as102_dev can never be NULL, so just drop the NULL check.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/as102/as102_usb_drv.c

@@ -303,10 +303,8 @@ static void as102_usb_release(struct kref *kref)
 	struct as102_dev_t *as102_dev;
 
 	as102_dev = container_of(kref, struct as102_dev_t, kref);
-	if (as102_dev != NULL) {
 	usb_put_dev(as102_dev->bus_adap.usb_dev);
 	kfree(as102_dev);
-	}
 }
 
 static void as102_usb_disconnect(struct usb_interface *intf)