qcacld-3.0: Update band to ICM module

ICM does not support hw_mode=any at present. When hw_mode is
set to any in hostapd.conf, HOST driver choose one band out of
2.4Ghz and 5Ghz based on "acs_freq_band" ini item and update the
ACS and PCL channel list accordingly. But currently driver does
not send updated band to ICM and so ICM still gets BAND_ALL from
HOST driver which is INVALID for ICM module. As a result ICM
algorithm does not run and channel selection fails.

Send Updated band to ICM and also update channel width accordingly
for 2.4Ghz band as it does not support 80/160/80PLUS80 Mhz.

Change-Id: I13593a3c59c204d1ff7677e67d96d039c9456568
CRs-Fixed: 2196247

core/hdd/src/wlan_hdd_cfg80211.c

@@ -2178,10 +2178,18 @@ static void hdd_get_scan_band(struct hdd_context *hdd_ctx,
 		hdd_err("invalid band");
 		if (HDD_EXTERNAL_ACS_FREQ_BAND_24GHZ ==
 			hdd_ctx->config->external_acs_freq_band)
-			hdd_update_acs_channel_list(sap_config, BAND_2G);
+			*band = BAND_2G;
 		else
-			hdd_update_acs_channel_list(sap_config, BAND_5G);
+			*band = BAND_5G;
+
+		hdd_update_acs_channel_list(sap_config, *band);
 	}
+
+	if (*band == BAND_2G &&
+	    (sap_config->acs_cfg.ch_width == CH_WIDTH_80MHZ ||
+	    sap_config->acs_cfg.ch_width == CH_WIDTH_160MHZ ||
+	    sap_config->acs_cfg.ch_width == CH_WIDTH_80P80MHZ))
+		sap_config->acs_cfg.ch_width = CH_WIDTH_40MHZ;
 }