qcacmn: Avoid CAC when switching to the same channel

Changes related to If63678a7e9ce00c1166e7f6533e5eaa0b0ae67a5
on modifying declaration of dfs_mlme_start_csa function on mlme side.

Change-Id: Id746faaaa2cdbdb48f80056eec3dd661a30122e5
CRs-fixed: 2117811
4 files changed