drm/amdgpu/powerplay: enable sysfs and debugfs interfaces late

To avoid users accessing them before the module has finished
initializing them and make sure they are only created if
dpm has properly initialized.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_powerplay.c

@@ -131,6 +131,10 @@ static int amdgpu_pp_late_init(void *handle)
 		ret = adev->powerplay.ip_funcs->late_init(
 					adev->powerplay.pp_handle);
 
+#ifdef CONFIG_DRM_AMD_POWERPLAY
+	if (adev->pp_enabled)
+		amdgpu_pm_sysfs_init(adev);
+#endif
 	return ret;
 }
 
@@ -145,7 +149,6 @@ static int amdgpu_pp_sw_init(void *handle)
 
 #ifdef CONFIG_DRM_AMD_POWERPLAY
 	if (adev->pp_enabled) {
-		amdgpu_pm_sysfs_init(adev);
 		if (amdgpu_dpm == 0)
 			adev->pm.dpm_enabled = false;
 		else