To bring OSIF driver synchronization in line with recent VDEV and PSOC
enhancements, add osif_driver_sync APIs. These allow for atomically
acquiring the driver synchronization context, and protecting various
call flows via DSC primitives.
Change-Id: Iba8df54bb1a3894118adf3daf1d0de8a554284ae
CRs-Fixed: 2408210
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
