This is just a small subset of the relevant functions, but should at
least catch all new code as every consumer has to call pwm_apply_state()
(or the legacy function pwm_config()) and every PWM provider has to
implement pwm_ops.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>