qcacld-3.0: Remove unwanted logging for usable channel
Currently, log is added when any frequency is populated
as usable channel frequency along with mode, band and other
params which could lead to multiple log addition if Band set
is ALL bands.
The change is to remove unwanted logging.
Change-Id: I02221df6a43aa0de8d79cb973adf124a5c52f89b
CRs-Fixed: 3579443