pwm: crc: Implement apply() method to support the new atomic PWM API

Replace the enable, disable and config pwm_ops with an apply op,
to support the new atomic PWM API.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200903112337.4113-13-hdegoede@redhat.com