zenfone9: Enable support for IEEE80211AC

 * This is to allow supporting GO with 11AC support.

Change-Id: I08793eaa6295c5cfe5ac11eeee2f92213af78844
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 025895d..1a72a59 100755
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -263,3 +263,4 @@
 WPA_SUPPLICANT_VERSION := VER_0_8_X
 
 CONFIG_ACS := true
+CONFIG_IEEE80211AC := true