qcacld-3.0: Refine the passpoint set/reset logic

Make the following updates to the passpoint set/reset logic:
1) Exclusively use the Unified WMI data structures.
2) Refactor the vendor command processing to improve code
   maintainability.

Change-Id: I39945b2cec90c3f34c81e5ca525842f1af9340f7
CRs-Fixed: 2334234
7 files changed