qcacld-3.0: Move sta_info from array based to hash based

Currently in hdd_adapter, the variable sta_info is an array of
hdd_station_info structured indexed by the sta_id. As sta_id is no
longer used this array based implementation becomes unnecessary.

Move the sta_info implementation to a hash table implementation.

Change-Id: I7d6fe04b7e0ab22615d431de9a10a4ad38ed65ba
CRs-Fixed: 2514280
18 files changed