pwm: Export of_pwm_xlate_with_flags()

Drivers may want to use this function if they support any of the flags
that can be passed via a third cell in the DT specifier. Since those
drivers may be built as modules the symbol needs to be exported to make
sure that it can be accessed.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

drivers/pwm/core.c

@@ -156,6 +156,7 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
 
 	return pwm;
 }
+EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags);
 
 static struct pwm_device *
 of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)