drm: of: Mark empty drm_of_get_data_lanes_count and drm_of_get_data_lanes_ep static

Mark empty implementations of drm_of_get_data_lanes_count and
drm_of_get_data_lanes_ep as static inline, just like the rest
of empty implementations of various functions in drm_of.h .
Add missing comma to drm_of_get_data_lanes_count_ep() .

Fixes: fc801750 ("drm: of: Add drm_of_get_data_lanes_count and drm_of_get_data_lanes_ep")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
To: dri-devel@lists.freedesktop.org
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220612132152.91052-1-marex@denx.de

include/drm/drm_of.h

@@ -112,16 +112,18 @@ drm_of_lvds_get_data_mapping(const struct device_node *port)
 	return -EINVAL;
 }
 
-int drm_of_get_data_lanes_count(const struct device_node *endpoint,
-				const unsigned int min, const unsigned int max)
+static inline int
+drm_of_get_data_lanes_count(const struct device_node *endpoint,
+			    const unsigned int min, const unsigned int max)
 {
 	return -EINVAL;
 }
 
-int drm_of_get_data_lanes_count_ep(const struct device_node *port,
-				   int port_reg, int reg
-				   const unsigned int min,
-				   const unsigned int max)
+static inline int
+drm_of_get_data_lanes_count_ep(const struct device_node *port,
+			       int port_reg, int reg,
+			       const unsigned int min,
+			       const unsigned int max)
 {
 	return -EINVAL;
 }