pwm: Check actual period and duty_cycle for ignored polarity test

When a lowlevel driver configures the wrong period that might
(historically) be ok if the emitted signal has a 100% relative duty_cycle
as that just corresponds to rounding down the duty_cycle to 0 which is an
allowed thing to do for a lowlevel driver.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Link: https://lore.kernel.org/r/bc511c0[e-mail]
Signed-off-by: Uwe Kleine-König <[e-mail]>

drivers/pwm/core.c

···
 	}
 
 	if (s2.polarity != state->polarity &&
-	    state->duty_cycle < state->period)
+	    s2.duty_cycle < s2.period)
 		dev_warn(pwmchip_parent(chip), ".apply ignored .polarity\n");
 
 	if (last->polarity == state->polarity &&