drm/amdgpu/gmc10: free stolen memory in late_init

We don't need to store the pre-OS console memory after
the driver has loaded so free it.
Reviewed-by: Huang Rui <ray.huang@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_v10_0.c

@@ -566,6 +566,8 @@ static int gmc_v10_0_late_init(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int r;
 
+	amdgpu_bo_late_init(adev);
+
 	r = amdgpu_gmc_allocate_vm_inv_eng(adev);
 	if (r)
 		return r;