omapfb: fix return value check in dsi_bind()

Fix the retrn value check which testing the wrong variable
in dsi_bind().

Fixes: f76ee892a99e ("omapfb: copy omapdss & displays for omapfb")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/omap2/omapfb/dss/dsi.c

@@ -5340,7 +5340,7 @@ static int dsi_bind(struct device *dev, struct device *master, void *data)
 
 	dsi->phy_base = devm_ioremap(&dsidev->dev, res->start,
 		resource_size(res));
-	if (!dsi->proto_base) {
+	if (!dsi->phy_base) {
 		DSSERR("can't ioremap DSI PHY\n");
 		return -ENOMEM;
 	}
@@ -5360,7 +5360,7 @@ static int dsi_bind(struct device *dev, struct device *master, void *data)
 
 	dsi->pll_base = devm_ioremap(&dsidev->dev, res->start,
 		resource_size(res));
-	if (!dsi->proto_base) {
+	if (!dsi->pll_base) {
 		DSSERR("can't ioremap DSI PLL\n");
 		return -ENOMEM;
 	}