drm/amdgpu: switch to mmhub ras callback for ras fini

invoke callback function for mmhub ras fini
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: John Clements <John.Clements@amd.com>
Reviewed-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -473,7 +473,7 @@ void amdgpu_gmc_ras_fini(struct amdgpu_device *adev)
 
 	if (adev->mmhub.ras_funcs &&
 	    adev->mmhub.ras_funcs->ras_fini)
-		amdgpu_mmhub_ras_fini(adev);
+		adev->mmhub.ras_funcs->ras_fini(adev);
 
 	if (adev->gmc.xgmi.ras_funcs &&
 	    adev->gmc.xgmi.ras_funcs->ras_fini)