drm/amd/amdgpu: Allow calling si_dpm_fini at any point

Allow calling fini even if ps array is not allocated.
Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -7519,9 +7519,9 @@ static void si_dpm_fini(struct amdgpu_device *adev)
 {
 	int i;
 
-	for (i = 0; i < adev->pm.dpm.num_ps; i++) {
+	if (adev->pm.dpm.ps)
+		for (i = 0; i < adev->pm.dpm.num_ps; i++)
 			kfree(adev->pm.dpm.ps[i].ps_priv);
-	}
 	kfree(adev->pm.dpm.ps);
 	kfree(adev->pm.dpm.priv);
 	kfree(adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries);