qcacld-3.0: Enable maximum 4 vdevs for Genoa auto

There is requirement to support maximum 4 devs on Genoa,
like sta + p2p + dual band sap, change CONFIG_WLAN_MAX_VDEVS from
3 to 4 for Genoa auto.

Change-Id: I17604b0ff191bf8ee13ebb48004c893f1fb353c2
CRs-Fixed: 2674091

configs/qcn7605_defconfig

@@ -1 +1,4 @@
 include $(WLAN_ROOT)/configs/genoa.pci.debug_defconfig
+
+# Number of vdevs supported at one time, used for allocating memory
+CONFIG_WLAN_MAX_VDEVS := 4