qcacmn: Fix the dfs apply rule logic to filter acs channel list

Currently the driver uses i both in outer and inner loop
which would corrupt the value of i and the loop would
never end.

Fix is to use another variable j for the loop.

Change-Id: I6f64fb45d1007621b03fe93cd29da7d4c827a23f
CRs-Fixed: 2476402