pwm: Update comment on struct pwm_ops::apply

Commit 71523d18 (pwm: Ensure pwm_apply_state() doesn't modify the
state argument) updated the kernel-doc for pwm_apply_state(), but not
for the ->apply callback in the pwm_ops struct.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

include/linux/pwm.h

@@ -243,10 +243,7 @@ pwm_set_relative_duty_cycle(struct pwm_state *state, unsigned int duty_cycle,
  * @request: optional hook for requesting a PWM
  * @free: optional hook for freeing a PWM
  * @capture: capture and report PWM signal
- * @apply: atomically apply a new PWM config. The state argument
- *	   should be adjusted with the real hardware config (if the
- *	   approximate the period or duty_cycle value, state should
- *	   reflect it)
+ * @apply: atomically apply a new PWM config
  * @get_state: get the current PWM state. This function is only
  *	       called once per PWM device when the PWM chip is
  *	       registered.