[media] cx231xx-core: fix GPIO comments

The number of the cx231xx REQ for GPIO register set/get are wrong.
They should follow what's there at cx231xx-pcb-cfg.h.

Noticed while checking the cx231xx parser at the v4l-utils.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

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

@@ -1475,14 +1475,14 @@ int cx231xx_send_gpio_cmd(struct cx231xx *dev, u32 gpio_bit, u8 *gpio_val,
 	/* set request */
 	if (!request) {
 		if (direction)
-			ven_req.bRequest = VRT_GET_GPIO;	/* 0x8 gpio */
+			ven_req.bRequest = VRT_GET_GPIO;	/* 0x9 gpio */
 		else
-			ven_req.bRequest = VRT_SET_GPIO;	/* 0x9 gpio */
+			ven_req.bRequest = VRT_SET_GPIO;	/* 0x8 gpio */
 	} else {
 		if (direction)
-			ven_req.bRequest = VRT_GET_GPIE;	/* 0xa gpie */
+			ven_req.bRequest = VRT_GET_GPIE;	/* 0xb gpie */
 		else
-			ven_req.bRequest = VRT_SET_GPIE;	/* 0xb gpie */
+			ven_req.bRequest = VRT_SET_GPIE;	/* 0xa gpie */
 	}
 
 	/* set index value */