qcacld-3.0: Correct condition to skip DFS channels

Currently the driver skips the DFS channels if
g_sta_sap_scc_on_dfs_chan = 2 which should not
happen as master mode is supported if this ini
is 2. Driver should only skip the DFS channels
if the ini value is 1.
Fix is to correct the condition for the same.

Change-Id: I9d6c2f2c42f9d9f4f1b5bd080b9cdc5c13e031f2
CRs-Fixed: 2700201