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

Kbuild

@@ -2945,7 +2945,7 @@ ccflags-y += -DWLAN_MAX_PSOCS=$(CONFIG_WLAN_MAX_PSOCS)
 CONFIG_WLAN_MAX_PDEVS ?= 1
 ccflags-y += -DWLAN_MAX_PDEVS=$(CONFIG_WLAN_MAX_PDEVS)
 
-CONFIG_WLAN_MAX_VDEVS ?= 5
+CONFIG_WLAN_MAX_VDEVS ?= 6
 ccflags-y += -DWLAN_MAX_VDEVS=$(CONFIG_WLAN_MAX_VDEVS)
 
 #Maximum pending commands for a vdev is calculated in vdev create handler