The PWM core can retrieve the period from the PWM lookup table, so the
struct led_pwm.pwm_period_ns member can be removed.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>