v1: replace casting to unsigned long with div64_ul
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NSlava Abramov <slava.abramov@amd.com>
Tested-by: NSlava Abramov <slava.abramov@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>