pwm: lpc18xx-sct: Don't modify the cached period of other PWM outputs

Even though the hardware only supports a single period for all PWM
outputs, modifying the other (disabled) outputs's period is strange and
wrong. Only the pwm core is supposed to update these values.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-lpc18xx-sct.c

@@ -194,7 +194,7 @@ static int lpc18xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 			      int duty_ns, int period_ns)
 {
 	struct lpc18xx_pwm_chip *lpc18xx_pwm = to_lpc18xx_pwm_chip(chip);
-	int requested_events, i;
+	int requested_events;
 
 	if (period_ns < lpc18xx_pwm->min_period_ns ||
 	    period_ns > lpc18xx_pwm->max_period_ns) {
@@ -223,8 +223,6 @@ static int lpc18xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 	if ((requested_events <= 2 && lpc18xx_pwm->period_ns != period_ns) ||
 	    !lpc18xx_pwm->period_ns) {
 		lpc18xx_pwm->period_ns = period_ns;
-		for (i = 0; i < chip->npwm; i++)
-			pwm_set_period(&chip->pwms[i], period_ns);
 		lpc18xx_pwm_config_period(chip, period_ns);
 	}