drm/amdgpu: set XGMI IP version manually for v6_4

The version can't be queried from discovery table.
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2449,6 +2449,9 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
 	if (amdgpu_ip_version(adev, XGMI_HWIP, 0) == IP_VERSION(4, 8, 0))
 		adev->gmc.xgmi.supported = true;
 
+	if (amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 3))
+		adev->ip_versions[XGMI_HWIP][0] = IP_VERSION(6, 4, 0);
+
 	/* set NBIO version */
 	switch (amdgpu_ip_version(adev, NBIO_HWIP, 0)) {
 	case IP_VERSION(6, 1, 0):