drm/msm/dp: fix incorrect function prototype of dp_debug_get()

Fix the incorrect function prototype for dp_debug_get()
in the dp_debug module to address compilation warning.
Also add prototype for msm_dp_debugfs_init() for fixing compilation
issue with other defconfigs.

changes in v2:
- add prototype for msm_dp_debugfs_init()

Fixes: f913454aae8e ("drm/msm/dp: move debugfs node to /sys/kernel/debug/dri/*/")
Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Abhinav Kumar <[e-mail]>
Signed-off-by: Rob Clark <[e-mail]>

drivers/gpu/drm/msm/dp/dp_debug.h

···
 static inline
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
 		struct dp_usbpd *usbpd, struct dp_link *link,
-		struct drm_connector **connector)
+		struct drm_connector **connector, struct drm_minor *minor)
 {
 	return ERR_PTR(-EINVAL);
 }

drivers/gpu/drm/msm/msm_drv.h

···
 {
 }
 
+static inline void msm_dp_debugfs_init(struct msm_dp *dp_display,
+		struct drm_minor *minor)
+{
+}
+
 #endif
 
 void __init msm_mdp_register(void);