hwmon: (lm93) Drop unnecessary compare statement

The following build warning is seen with -Wextra.

lm93.c: In function ‘store_fan_smart_tach’:
lm93.c:1833:2: warning: comparison of unsigned expression >= 0 is always true

Drop the unnecessary comparison.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NJean Delvare <khali@linux-fr.org>

drivers/hwmon/lm93.c

@@ -1830,7 +1830,7 @@ static ssize_t store_fan_smart_tach(struct device *dev,
 
 	mutex_lock(&data->update_lock);
 	/* sanity test, ignore the write otherwise */
-	if (0 <= val && val <= 2) {
+	if (val <= 2) {
 		/* can't enable if pwm freq is 22.5KHz */
 		if (val) {
 			u8 ctl4 = lm93_read_byte(client,