drm/amdgpu: cleanup vega10 SRIOV code path

we can simplify all those unnecessary function under
SRIOV for vega10 since:
1) PSP L1 policy is by force enabled in SRIOV
2) original logic always set all flags which make itself
   a dummy step

besides,
1) the ih_doorbell_range set should also be skipped
for VEGA10 SRIOV.
2) the gfx_common registers should also be skipped
for VEGA10 SRIOV.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Emily Deng <Emily.Deng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/soc15.c

@@ -1123,21 +1123,18 @@ static void soc15_doorbell_range_init(struct amdgpu_device *adev)
 	int i;
 	struct amdgpu_ring *ring;
 
-	/*  Two reasons to skip
-	*		1, Host driver already programmed them
-	*		2, To avoid registers program violations in SR-IOV
-	*/
-	if (!amdgpu_virt_support_skip_setting(adev)) {
+	/* sdma/ih doorbell range are programed by hypervisor */
+	if (!amdgpu_sriov_vf(adev)) {
 		for (i = 0; i < adev->sdma.num_instances; i++) {
 			ring = &adev->sdma.instance[i].ring;
 			adev->nbio_funcs->sdma_doorbell_range(adev, i,
 				ring->use_doorbell, ring->doorbell_index,
 				adev->doorbell_index.sdma_doorbell_range);
 		}
-	}
 
-	adev->nbio_funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
+		adev->nbio_funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
 						adev->irq.ih.doorbell_index);
+	}
 }
 
 static int soc15_common_hw_init(void *handle)