staging: iio: adc: ad7816.c: Replace bit shifting with BIT macro

Challenge suggested by coccinelle.
Prefer using BIT and replace bit shifting with the BIT(x) macro.
Signed-off-by: Payal Kshirsagar <payal.s.kshirsagar.98@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/adc/ad7816.c

@@ -231,7 +231,7 @@ static ssize_t ad7816_show_value(struct device *dev,
 		value = (s8)((data >> AD7816_TEMP_FLOAT_OFFSET) - 103);
 		data &= AD7816_TEMP_FLOAT_MASK;
 		if (value < 0)
-			data = (1 << AD7816_TEMP_FLOAT_OFFSET) - data;
+			data = BIT(AD7816_TEMP_FLOAT_OFFSET) - data;
 		return sprintf(buf, "%d.%.2d\n", value, data * 25);
 	}
 	return sprintf(buf, "%u\n", data);