drm/amdgpu/sriov: Need to initialize the HDP_NONSURFACE_BAStE

it requires to initialize HDP_NONSURFACE_BASE, so as to avoid
using the value left by a previous VM under sriov scenario.

v2: it should not hurt baremetal, generalize it for both sriov
and baremetal
Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Signed-off-by: Tiecheng Zhou <Tiecheng.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -1181,6 +1181,9 @@ static int gmc_v9_0_gart_enable(struct amdgpu_device *adev)
 	tmp = RREG32_SOC15(HDP, 0, mmHDP_HOST_PATH_CNTL);
 	WREG32_SOC15(HDP, 0, mmHDP_HOST_PATH_CNTL, tmp);
 
+	WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE, (adev->gmc.vram_start >> 8));
+	WREG32_SOC15(HDP, 0, mmHDP_NONSURFACE_BASE_HI, (adev->gmc.vram_start >> 40));
+
 	/* After HDP is initialized, flush HDP.*/
 	adev->nbio_funcs->hdp_flush(adev, NULL);