Add NULL check in modules
Signed-off-by: NAnthony Koo <anthony.koo@amd.com>
Acked-by: NHarry Wentland <Harry.Wentland@amd.com>
Reviewed-by: NTony Cheng <Tony.Cheng@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>