wlan: Add config parameter for PER based roam full scan

DUT should do a full scan if it is not able to find candidate
AP from the roam cache list. This full scan has to be done when
there is significant RSSI change which is configurable via ini.

Add changes for config paramer upon which full scan will be done.

CRs-Fixed: 1059278
Change-Id: Ia7b069f18560bebf3a593510bbd4babb293ea8b5
9 files changed
tree: 9dec8e4e03c135faac88806662e37215e7eb774e
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig
  7. Makefile