[media] cx231xx: Fix I2C on Internal Master 3 Bus

Internal Master 3 Bus can send and receive only 4 bytes per time.
Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/usb/cx231xx/cx231xx-core.c

@@ -355,7 +355,12 @@ int cx231xx_send_vendor_cmd(struct cx231xx *dev,
 	 */
 	if ((ven_req->wLength > 4) && ((ven_req->bRequest == 0x4) ||
 					(ven_req->bRequest == 0x5) ||
-					(ven_req->bRequest == 0x6))) {
+					(ven_req->bRequest == 0x6) ||
+
+					/* Internal Master 3 Bus can send
+					 * and receive only 4 bytes per time
+					 */
+					(ven_req->bRequest == 0x2))) {
 		unsend_size = 0;
 		pdata = ven_req->pBuff;