qcacld-3.0: Introduce ini for roam_triggers including sta kickout trigger

Introduce ini for roaming_triggers to enable/disable specific
roaming triggers. This will be the master ini to control roaming
triggers. If this ini is set to zero, roaming will not be enabled
on the sta interface unless its enabled via vendor command.
A new roaming trigger - Sta kickout roaming is introduced in
firmware, include this bit support also in the ini.

The value of this ini will be sent over the wmi command
WMI_ROAM_ENABLE_DISABLE_TRIGGER_REASON_CMDID during RSO start.
Reset this value to 0 during RSO stop if RSO stop is due to
disconnect or roam synch failure.

Change-Id: I02f207cdde9d8fb68cd91fab07572baa9e7ac50d
CRs-Fixed: 2631712
13 files changed