pwm: berlin: Ensure configuring period and duty_cycle isn't wrongly skipped

As the last call to berlin_pwm_apply() might have exited early if
state->enabled was false, the values for period and duty_cycle stored in
pwm->state might not have been written to hardware and it must be
ensured that they are configured before enabling the PWM.

Fixes: 30dffb42fcd4 ("pwm: berlin: Implement .apply() callback")
Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/pwm/pwm-berlin.c

···
 		return 0;
 	}
 
-	if (state->period != pwm->state.period ||
-	    state->duty_cycle != pwm->state.duty_cycle) {
-		err = berlin_pwm_config(chip, pwm, state->duty_cycle, state->period);
-		if (err)
-			return err;
-	}
+	err = berlin_pwm_config(chip, pwm, state->duty_cycle, state->period);
+	if (err)
+		return err;
 
 	if (!enabled)
 		return berlin_pwm_enable(chip, pwm);