sm8450-common: Enable support for IEEE80211AX

 * This is to allow supporting WiFi 6 mobile hotspots,
   to be noted this is only supported on SDM855+ platforms.

Change-Id: Iab61bd12499968e8823b3078acd1c7b8bce46136

BoardConfigCommon.mk

@@ -272,6 +272,7 @@ BOARD_HOSTAPD_DRIVER := NL80211
 BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_$(BOARD_WLAN_DEVICE)
 BOARD_WPA_SUPPLICANT_DRIVER := NL80211
 BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_$(BOARD_WLAN_DEVICE)
+CONFIG_IEEE80211AX := true
 QC_WIFI_HIDL_FEATURE_DUAL_AP := true
 QC_WIFI_HIDL_FEATURE_DUAL_STA := true
 WIFI_DRIVER_BUILT := qca_cld3