qcacld-3.0: add band 6ghz flag to fix building error

Default kernel version 5.4 not support all 6GHz changes,
and msm-5.4 kernel introduced below commit to do backport:
Git-commit: 3290a9818c538b88d4e75b5891fa530e9142c219.

This causes building error on third party platform with
kernel version 5.4. Fix it with adding CONFIG_BAND_6GHZ flag.

Change-Id: I967a5e5c1ab3b3bc349f2685950f3bfe6b33255e
CRs-Fixed: 3148383

os_if/tdls/src/wlan_cfg80211_tdls.c

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2017-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -238,7 +239,7 @@ tdls_calc_channels_from_staparams(struct tdls_update_peer_params *req_info,
 }
 
 #ifdef WLAN_FEATURE_11AX
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)) && defined(CONFIG_BAND_6GHZ)
 static void
 wlan_cfg80211_tdls_extract_6ghz_params(struct tdls_update_peer_params *req_info,
 				       struct station_parameters *params)