[media] rcar-vin: refactor and fold in function after stall handling rework

With the driver stopping and starting the stream each time the driver is
stalled rvin_capture_off() can be folded in to the only caller.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

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

@@ -397,12 +397,6 @@ static void rvin_capture_on(struct rvin_dev *vin)
 		rvin_write(vin, VNFC_S_FRAME, VNFC_REG);
 }
 
-static void rvin_capture_off(struct rvin_dev *vin)
-{
-	/* Set continuous & single transfer off */
-	rvin_write(vin, 0, VNFC_REG);
-}
-
 static int rvin_capture_start(struct rvin_dev *vin)
 {
 	struct rvin_buffer *buf, *node;
@@ -436,7 +430,8 @@ static int rvin_capture_start(struct rvin_dev *vin)
 
 static void rvin_capture_stop(struct rvin_dev *vin)
 {
-	rvin_capture_off(vin);
+	/* Set continuous & single transfer off */
+	rvin_write(vin, 0, VNFC_REG);
 
 	/* Disable module */
 	rvin_write(vin, rvin_read(vin, VNMC_REG) & ~VNMC_ME, VNMC_REG);