BugID:16944965: Add AOS_NETWORK_SAL to Config.in
The default value coulde be changed from board Config.in via:
+ config AOS_NETWORK_SAL
+     default y
@@ -2,6 +2,10 @@ config AOS_NETWORK
bool "Network Configuration"
default y
+config AOS_NETWORK_SAL
+ bool "Support SAL"
+ default n
+
if AOS_NETWORK
source "network/umesh/Config.in"
source "network/halwifi/Config.in"
