media: ti: cal 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:
./platform/ti/cal/cal.c:1111:3-10: 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/platform/ti/cal/cal.c

···
 		return 0;
 	}
 
-	dev_warn(cal->dev, "failed to get ti,camerrx-control: %ld\n",
-		 PTR_ERR(syscon));
+	dev_warn(cal->dev, "failed to get ti,camerrx-control: %pe\n", syscon);
 
 	/*
 	 * Backward DTS compatibility. If syscon entry is not present then