[DRIVER] fxl6408: fix warn about excess arguments

From GCC: "warning: too many arguments for format [-Wformat-extra-args]"
Remove excess argument to reporting function.

drivers/gpio/gpio-fxl6408.c

@@ -168,7 +168,7 @@ static int fxl6408_probe(struct i2c_client *client,
 			dev_err(dev, "Could not get reset-gpios: %d\n", ret);
 			return ret;
 		}
-		dev_warn(dev, "Could not get reset-gpios: already in use\n", ret);
+		dev_warn(dev, "Could not get reset-gpios: already in use\n");
 	}
 
 	/* Check the device ID register to see if it's responding.