qcacld-3.0: Introduce new ini to configure disconnect/idle roam scans

Add new ini to configure required parameters to trigger
disconnect/idle roam scan:
1.enable_disconnect_roam_offload
	When this ini is enabled firmware will trigger roam scan
	and roam to a new ap if candidate is found and it will
	not forward the deauth frame to the host driver. If
	roaming fails after this deauth, then firmware will
	forward the deauth frame to the host. If roaming is
	successful, we will follow the normal roam synch event
	path.
2.enable_idle_roam
	When this ini is enabled firmware will trigger roam scan
	and roam to a new ap if current connected AP rssi falls
	below the threshold. To consider the connection as idle,
	the following conditions should be met:
		1. When user space sends "SET SUSPENDMODE"
		   command with value 0.
		2. No TX/RX data for idle time configured
		3. Connected AP rssi change doesn't exceed the
		   threshold
		4. Connected AP rssi false below minimum rssi.
3. idle_roam_rssi_delta
	RSSI change in current connected AP above/below which
	idle roam scan will be triggered if other criteria is
	met.
4. idle_roam_inactive_time
	Time duration in milliseconds for which the connection is
	to be considered idle.
5. idle_data_packet_count
	number of tx/rx packets below which the connection is
	idle.

Change-Id: Ibd1c91656ecd681f8dc83bc77197668a7f3bfa3f
CRs-Fixed: 2427132
4 files changed