qcacld-3.0: Add file structure for osif_sync

To better align with current organizational recommendations and allow
API use by os_if/nan, begin moving hdd_*_sync APIs to os_if. In step
one, create the new osif_sync file structure.

Change-Id: Ica94d32028d10d344294d6cc12d91a06efe1ab6c
CRs-Fixed: 2396511
12 files changed