wlan: iwpriv getRoamRssi to query RSSI from roaming engine

A new iwpriv getRoamRssi is supported to query RSSI from
the LFR firmware monitoring.
Since the RSSI monitoring and penalization is done in
Riva in BMPS mode. Iwpriv wlan0 getRoamRSSI fetches RSSI
from the riva only in BMPS Mode. If this command is used
while not associated or not in BMPS mode, it returns a value of 0

Change-Id: Ifa660c51685af5dd5d20b28546aa1b9d4f217082
CRs-Fixed: 427473
20 files changed
tree: 87a77008aea19fe6927bcfd7d996d5a08f31568b
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig