Revert "Remove Microseconds from System::Clock (#11450)"#11481

Merged

andy31415 merged 1 commit intoproject-chip:masterfrom andy31415:fix_build_usec

Nov 5, 2021

+147-17

Commits on Nov 5, 2021

Revert "Remove Microseconds from System::Clock (project-chip#11450 )"
andy31415
committed