pwm: core: Make of_pwm_get() static

There are no users outside of PWM core of the of_pwm_get().
Make it static.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220826172642.16404-3-andriy.shevchenko@linux.intel.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/pwm/core.c

@@ -734,8 +734,8 @@ static struct device_link *pwm_device_link_add(struct device *dev,
  * Returns: A pointer to the requested PWM device or an ERR_PTR()-encoded
  * error code on failure.
  */
-struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np,
-			      const char *con_id)
+static struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np,
+				     const char *con_id)
 {
 	struct pwm_device *pwm = NULL;
 	struct of_phandle_args args;
@@ -797,7 +797,6 @@ struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np,
 
 	return pwm;
 }
-EXPORT_SYMBOL_GPL(of_pwm_get);
 
 /**
  * acpi_pwm_get() - request a PWM via parsing "pwms" property in ACPI

include/linux/pwm.h

@@ -403,8 +403,6 @@ struct pwm_device *of_pwm_single_xlate(struct pwm_chip *pc,
 				       const struct of_phandle_args *args);
 
 struct pwm_device *pwm_get(struct device *dev, const char *con_id);
-struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np,
-			      const char *con_id);
 void pwm_put(struct pwm_device *pwm);
 
 struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id);
@@ -495,14 +493,6 @@ static inline struct pwm_device *pwm_get(struct device *dev,
 	return ERR_PTR(-ENODEV);
 }
 
-static inline struct pwm_device *of_pwm_get(struct device *dev,
-					    struct device_node *np,
-					    const char *con_id)
-{
-	might_sleep();
-	return ERR_PTR(-ENODEV);
-}
-
 static inline void pwm_put(struct pwm_device *pwm)
 {
 	might_sleep();