qcacld-3.0: Adjust beacon miss timeout in awake and sleep modes
In beacon loss, roaming condition is triggered when client doesn't
receives beacon packets from connected AP for 3 to 5 Secs.
There is no significance of 6Secs and 10Secs timeout in wakeup
and sleep modes respectively, as STA will disconnect after
partial+full roam scan.
Trigger beacon loss roaming that is half of link loss timeout
in wakeup and sleep modes.
Change-Id: I12ef4201a0457ca716ad857caad6c1be334e17f0
CRs-Fixed: 3306658