[media] dvb_usb_v2: fix dvb_usb_generic_rw() debug

Debug prints write operation data instead of read data was
intention.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-usb/dvb_usb_urb.c

@@ -55,7 +55,8 @@ int dvb_usbv2_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
 					KBUILD_MODNAME, ret);
 		else
 			print_hex_dump(KERN_DEBUG, KBUILD_MODNAME ": <<< ",
-					DUMP_PREFIX_NONE, 32, 1, wbuf, wlen, 0);
+					DUMP_PREFIX_NONE, 32, 1, rbuf, actlen,
+					0);
 	}
 
 	mutex_unlock(&d->usb_mutex);