qcacld-3.0: Enable CONFIG_QCA6290_11AX by default

QCA6290 non-AX chipset is deprecated, so enable changes for QCA6290 AX
chipset by default.

Change-Id: I09b52dc58c1a79e36502671de94021d5940d0072
CRs-fixed: 2331182

configs/default_defconfig

@@ -3,6 +3,7 @@ ifeq ($(CONFIG_CNSS_QCA6290), y)
 		CONFIG_QCA_WIFI_NAPIER_EMULATION := y
 	endif
 	CONFIG_LITHIUM := y
+	CONFIG_QCA6290_11AX := y
 	CONFIG_WLAN_FEATURE_11AX := y
 	CONFIG_WLAN_FEATURE_DFS_OFFLOAD := y
 	CONFIG_IPA3 := n