leds: pwm: simplify if condition

.pwm_period_ns is an unsigned integer. So when led->pwm_period_ns > 0
is false, we now assign 0 to a value that is already 0, so it doesn't
hurt and we can skip checking the actual value.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Tested-by: Jeff LaBundy <jeff@labundy.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-pwm.c

@@ -102,7 +102,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
 	pwm_get_args(led_data->pwm, &pargs);
 
 	led_data->period = pargs.period;
-	if (!led_data->period && (led->pwm_period_ns > 0))
+	if (!led_data->period)
 		led_data->period = led->pwm_period_ns;
 
 	ret = devm_led_classdev_register(dev, &led_data->cdev);