Wifi: WAPI HAL skeleton

Add HAL implementation skeleton for vendors.
Vendors need to complete the implementation and uncomment
"CONFIG_WAPI_INTERFACE=y" to support WAPI interface.

Bug: 139257562
Test: atest VtsHalWifiSupplicantV1_3TargetTest
Change-Id: Id7a58b242776d641a091b9ede3f147b7d42003d1
diff --git a/hostapd/Makefile b/hostapd/Makefile
index 955e278..f01f581 100644
--- a/hostapd/Makefile
+++ b/hostapd/Makefile
@@ -309,6 +309,10 @@
 NEED_SHA512=y
 endif
 
+ifdef CONFIG_WAPI_INTERFACE
+L_CFLAGS += -DCONFIG_WAPI_INTERFACE
+endif
+
 ifdef CONFIG_AIRTIME_POLICY
 CFLAGS += -DCONFIG_AIRTIME_POLICY
 OBJS += ../src/ap/airtime_policy.o