staging:r8188eu: refactor issue_assocreq() - remove rtw_hal_get_hwreg() call

rtw_hal_get_hwreg(..., HW_VAR_RF_TYPE,...) always return RF_1T1R value.
Replace the function call with RF_1T1R value and refactor issue_assocreq().
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_mlme_ext.c

@@ -1027,7 +1027,7 @@ static void issue_assocreq(struct adapter *padapter)
 	struct ieee80211_hdr *pwlanhdr;
 	__le16 *fctrl;
 	unsigned int	i, j, ie_len, index = 0;
-	unsigned char	rf_type, bssrate[NumRates], sta_bssrate[NumRates];
+	unsigned char bssrate[NumRates], sta_bssrate[NumRates];
 	struct ndis_802_11_var_ie *pIE;
 	struct registry_priv	*pregpriv = &padapter->registrypriv;
 	struct xmit_priv		*pxmitpriv = &(padapter->xmitpriv);
@@ -1150,25 +1150,9 @@ static void issue_assocreq(struct adapter *padapter)
 			/* todo: disable SM power save mode */
 			pmlmeinfo->HT_caps.cap_info |= cpu_to_le16(0x000c);
 
-			rtw_hal_get_hwreg(padapter, HW_VAR_RF_TYPE, (u8 *)(&rf_type));
-			switch (rf_type) {
-			case RF_1T1R:
-				if (pregpriv->rx_stbc)
-					pmlmeinfo->HT_caps.cap_info |= cpu_to_le16(0x0100);/* RX STBC One spatial stream */
-				memcpy((u8 *)&pmlmeinfo->HT_caps.mcs, MCS_rate_1R, 16);
-				break;
-			case RF_2T2R:
-			case RF_1T2R:
-			default:
-				if ((pregpriv->rx_stbc == 0x3) ||/* enable for 2.4/5 GHz */
-				    ((pmlmeext->cur_wireless_mode & WIRELESS_11_24N) && (pregpriv->rx_stbc == 0x1)) || /* enable for 2.4GHz */
-				    (pregpriv->wifi_spec == 1)) {
-					DBG_88E("declare supporting RX STBC\n");
-					pmlmeinfo->HT_caps.cap_info |= cpu_to_le16(0x0200);/* RX STBC two spatial stream */
-				}
-				memcpy(&pmlmeinfo->HT_caps.mcs, MCS_rate_2R, 16);
-				break;
-			}
+			if (pregpriv->rx_stbc)
+				pmlmeinfo->HT_caps.cap_info |= cpu_to_le16(0x0100);/* RX STBC One spatial stream */
+			memcpy((u8 *)&pmlmeinfo->HT_caps.mcs, MCS_rate_1R, 16);
 			pframe = rtw_set_ie(pframe, _HT_CAPABILITY_IE_, ie_len, (u8 *)(&(pmlmeinfo->HT_caps)), &(pattrib->pktlen));
 		}
 	}