qcacmn: Fix to prevent channel switch to channels in NOL list
This fix prevents channel switch to a DFS channel already in the NOL list
during a doth_chanswitch or chan command, within the NOL time out.
When a DFS channel gets added to NOL list, channel flags update to
indicate a radar set on the channel
Change-Id: Ifddd6e861b408a680ec310d42d6518fbb46d733e
CRs-fixed: 2121225