drm/amdgpu: skip "Issue additional private vm invalidation to MMHUB" on SRIOV

[Why]
vm_l2_bank_select_reserved_cid2 is a PF_only register
that cannot be programmed by VF. This feature is only
support HDP using GPUVM page tables to access FB memory
which should be disabled on SRIOV.

[How]
Disable the feature on VF.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Signed-off-by: Horace Chen <horace.chen@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c

@@ -234,7 +234,8 @@ static void gmc_v11_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
 
 	/* Issue additional private vm invalidation to MMHUB */
 	if ((vmhub != AMDGPU_GFXHUB_0) &&
-	    (hub->vm_l2_bank_select_reserved_cid2)) {
+	    (hub->vm_l2_bank_select_reserved_cid2) &&
+		!amdgpu_sriov_vf(adev)) {
 		inv_req = RREG32_NO_KIQ(hub->vm_l2_bank_select_reserved_cid2);
 		/* bit 25: RSERVED_CACHE_PRIVATE_INVALIDATION */
 		inv_req |= (1 << 25);