media: i.MX6: Fix MIPI CSI-2 LP-11 check

Bitmask for the MIPI CSI-2 data PHY status doesn't seem to be correct.
Fix it.

Signed-off-by: Krzysztof Ha?asa <khalasa@piap.pl>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/imx/imx6-mipi-csi2.c

@@ -252,8 +252,8 @@ static int csi2_dphy_wait_stopstate(struct csi2_dev *csi2)
 	u32 mask, reg;
 	int ret;
 
-	mask = PHY_STOPSTATECLK |
-		((csi2->bus.num_data_lanes - 1) << PHY_STOPSTATEDATA_BIT);
+	mask = PHY_STOPSTATECLK | (((1 << csi2->bus.num_data_lanes) - 1) <<
+				   PHY_STOPSTATEDATA_BIT);
 
 	ret = readl_poll_timeout(csi2->base + CSI2_PHY_STATE, reg,
 				 (reg & mask) == mask, 0, 500000);