drm/amdgpu/display: dm/amdgpu: make dp phy debugfs for eDP

[WHY] dp debugfs file does not exist for eDP under
      /sys/kernel/debug/dri/0/eDP-1. the root is phy debugfs
      is created for dp connector only.
[HOW] for eDP connector, create phy debugfs too.
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: David Francis <David.Francis@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

@@ -705,7 +705,8 @@ int connector_debugfs_init(struct amdgpu_dm_connector *connector)
 	int i;
 	struct dentry *ent, *dir = connector->base.debugfs_entry;
 
-	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+	    connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
 		for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) {
 			ent = debugfs_create_file(dp_debugfs_entries[i].name,
 						  0644,