Add CONFIG_NETDEV_LATEINIT that can be used to suppress calls to up_netinitialize() from early initialization

arch/x86/src/common/up_initialize.c

@@ -188,9 +188,11 @@ void up_initialize(void)
   ramlog_sysloginit();
 #endif
 
+#ifndef CONFIG_NETDEV_LATEINIT
   /* Initialize the network */
 
   up_netinitialize();
+#endif
 
   /* Initialize USB -- device and/or host */