qcacld-3.0: Increase max supported vdevs by driver to 6

Maximum no.of supported vdevs by driver are currently 5. Increase
it to 6 to allow the creation of a separate vdev for NAN.

Change-Id: I1cdc4cc88142bf7a2ad9ab7b8f518453482d2b86
CRs-Fixed: 2592023
1 file changed