pwm: Drop duplicate check against chip->npwm in of_pwm_xlate_with_flags()

args->args[0] is passed as parameter "index" to pwm_request_from_chip().
The latter function also checks for index >= npwm, so
of_pwm_xlate_with_flags() doesn't need to do that.

Link: https://lore.kernel.org/r/b06e445a6ed62a339add727eccb969a33d678386.1704835845.git.u.kleine-koenig@pengutronix.deSigned-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

drivers/pwm/core.c

@@ -111,9 +111,6 @@ of_pwm_xlate_with_flags(struct pwm_chip *chip, const struct of_phandle_args *arg
 	if (args->args_count < 1)
 		return ERR_PTR(-EINVAL);
 
-	if (args->args[0] >= chip->npwm)
-		return ERR_PTR(-EINVAL);
-
 	pwm = pwm_request_from_chip(chip, args->args[0], NULL);
 	if (IS_ERR(pwm))
 		return pwm;