qcacld-3.0: Update stations bw info field value in VHT20 scenario

qcacld-2.0 to qcacld-3.0 propagation

After station is associatied in VHT20, update station info
txrate bw field for VHT20 case when cfg80211_get_station is
triggered

Change-Id: Ia3547083d5f4fb031fd186234b2d13126d8a9712
CRs-Fixed: 2086316

core/hdd/src/wlan_hdd_stats.c

@@ -4274,6 +4274,8 @@ static int wlan_hdd_get_sta_stats(struct wiphy *wiphy,
 				hdd_set_rate_bw(&sinfo->txrate, HDD_RATE_BW_80);
 			else if (rate_flags & TX_RATE_VHT40)
 				hdd_set_rate_bw(&sinfo->txrate, HDD_RATE_BW_40);
+			else if (rate_flags & TX_RATE_VHT20)
+				hdd_set_rate_bw(&sinfo->txrate, HDD_RATE_BW_20);
 
 			if (rate_flags &
 			    (TX_RATE_HT20 | TX_RATE_HT40)) {