sm6250-common: NAN: set property 'wifi.aware.interface' to use separate interface

This CL is to set 'wifi.aware.interface' property for the targets
where separate NAN discovery interface is supported.

Change-Id: Ib892f2207a9366a5a86071fd6d3c4b37e174b08c
CRs-Fixed: 2680050

vendor.prop

@@ -231,3 +231,6 @@ persist.vendor.ssr.restart_level=ALL_ENABLE
 # WFD
 persist.debug.wfd.enable=1
 persist.sys.wfd.virtual=0
+
+# Wi-Fi
+wifi.aware.interface=wifi-aware0