iio: st_accel: remove redundant unsigned less than zero check

The check that variable val is less than zero is redundant since val
is an unsigned int and hence can never be less than zero. Remove it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/st_accel_core.c

@@ -992,7 +992,7 @@ static int apply_acpi_orientation(struct iio_dev *indio_dev,
 			goto out;
 
 		val = elements[i].integer.value;
-		if (val < 0 || val > 2)
+		if (val > 2)
 			goto out;
 
 		/* Avoiding full matrix multiplication, we simply reorder the