drm/amd/display: Enable gpu_vm_support for dcn3.01

[Why]
dcn3_01 supports gpu_vm, but this is not enabled in amdgpu_dm
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -1035,6 +1035,11 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 		if (ASICREV_IS_GREEN_SARDINE(adev->external_rev_id))
 			init_data.flags.disable_dmcu = true;
 		break;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	case CHIP_VANGOGH:
+		init_data.flags.gpu_vm_support = true;
+		break;
+#endif
 	default:
 		break;
 	}