media: i2c: mt9v111: Use %pe format specifier

The %pe format specifier is designed to print error pointers. It prints
a symbolic error name (eg. -EINVAL) and it makes the code simpler by
omitting PTR_ERR().

This patch fixes this cocci report:
./i2c/mt9v111.c:1143:3-10: WARNING: Consider using %pe to print PTR_ERR()
./i2c/mt9v111.c:1151:3-10: WARNING: Consider using %pe to print PTR_ERR()
./i2c/mt9v111.c:1159:3-10: WARNING: Consider using %pe to print PTR_ERR()

Signed-off-by: Ricardo Ribalda <[e-mail]>
Acked-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/i2c/mt9v111.c

···
 	mt9v111->oe = devm_gpiod_get_optional(&client->dev, "enable",
 					      GPIOD_OUT_LOW);
 	if (IS_ERR(mt9v111->oe)) {
-		dev_err(&client->dev, "Unable to get GPIO \"enable\": %ld\n",
-			PTR_ERR(mt9v111->oe));
+		dev_err(&client->dev, "Unable to get GPIO \"enable\": %pe\n",
+			mt9v111->oe);
 		return PTR_ERR(mt9v111->oe);
 	}
 
 	mt9v111->standby = devm_gpiod_get_optional(&client->dev, "standby",
 						   GPIOD_OUT_HIGH);
 	if (IS_ERR(mt9v111->standby)) {
-		dev_err(&client->dev, "Unable to get GPIO \"standby\": %ld\n",
-			PTR_ERR(mt9v111->standby));
+		dev_err(&client->dev, "Unable to get GPIO \"standby\": %pe\n",
+			mt9v111->standby);
 		return PTR_ERR(mt9v111->standby);
 	}
 
 	mt9v111->reset = devm_gpiod_get_optional(&client->dev, "reset",
 						 GPIOD_OUT_LOW);
 	if (IS_ERR(mt9v111->reset)) {
-		dev_err(&client->dev, "Unable to get GPIO \"reset\": %ld\n",
-			PTR_ERR(mt9v111->reset));
+		dev_err(&client->dev, "Unable to get GPIO \"reset\": %pe\n",
+			mt9v111->reset);
 		return PTR_ERR(mt9v111->reset);
 	}