qcacmn: Implement interface to set WLM level

WLAN Latency module (WLM) is added by fw to gain latency
because of schedule out of service like power saving,
scanning, roaming etc. per the level set by framework.

Change-Id: I6b8775e5f492b6f287d60d39610a544114185a23
CRs-Fixed: 2152290
6 files changed