media: usb: dvb-usb-v2: af9015.c: return 0 instead of 'ret'.

Since 'ret' is known to be 0, just return '0'. This fixes two smatch warnings:

af9015.c:1168 af9015_rc_query() warn: missing error code? 'ret'
af9015.c:1177 af9015_rc_query() warn: missing error code? 'ret'
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/dvb-usb-v2/af9015.c

@@ -1165,7 +1165,7 @@ static int af9015_rc_query(struct dvb_usb_device *d)
 	/* If any of these are non-zero, assume invalid data */
 	if (buf[1] || buf[2] || buf[3]) {
 		dev_dbg(&intf->dev, "invalid data\n");
-		return ret;
+		return 0;
 	}
 
 	/* Check for repeat of previous code */
@@ -1174,7 +1174,7 @@ static int af9015_rc_query(struct dvb_usb_device *d)
 		dev_dbg(&intf->dev, "key repeated\n");
 		rc_repeat(d->rc_dev);
 		state->rc_repeat = buf[6];
-		return ret;
+		return 0;
 	}
 
 	/* Only process key if canary killed */