qcacld-3.0: Update stations bw info field value in HT20 scenario

qcacld-2.0 to qcacld-3.0 propagation

After station is associatied in HT20, when cfg80211_get_station
is triggered, update station info txrate bw field for HT20

Change-Id: Icc2c5f318d7812696202705edda17c7352f66fba
CRs-Fixed: 2121005

core/hdd/src/wlan_hdd_stats.c

@@ -4281,6 +4281,9 @@ static int wlan_hdd_get_sta_stats(struct wiphy *wiphy,
 				if (rate_flags & TX_RATE_HT40)
 					hdd_set_rate_bw(&sinfo->txrate,
 							HDD_RATE_BW_40);
+				else if (rate_flags & TX_RATE_HT20)
+					hdd_set_rate_bw(&sinfo->txrate,
+							HDD_RATE_BW_20);
 			} else {
 				sinfo->txrate.flags |= RATE_INFO_FLAGS_VHT_MCS;
 			}