wlan: Set TxBF csn value based on ini configuration.

Broadcom AP has an issue that when pronto advertise the csn value
as 3 it uses the 2 antenna in the NDPA packet but it suppose to
use the 3 antenna in the NDPA packet. If we advertise the csn value
as 2 then it uses 3 antenna in the NDPA packet. We need to have
ini configuration for setting the csn value.

CRs-Fixed: 453491
Change-Id: I757a9dd5dbb5bf957f92253b9499802148302903
diff --git a/CORE/HDD/inc/wlan_hdd_cfg.h b/CORE/HDD/inc/wlan_hdd_cfg.h
index 698e8cd..ee7e8d1 100644
--- a/CORE/HDD/inc/wlan_hdd_cfg.h
+++ b/CORE/HDD/inc/wlan_hdd_cfg.h
@@ -1595,6 +1595,12 @@
 #define CFG_VHT_SU_BEAMFORMEE_CAP_FEATURE_MIN     ( WNI_CFG_VHT_SU_BEAMFORMEE_CAP_STAMIN )
 #define CFG_VHT_SU_BEAMFORMEE_CAP_FEATURE_MAX     ( WNI_CFG_VHT_SU_BEAMFORMEE_CAP_STAMAX )
 #define CFG_VHT_SU_BEAMFORMEE_CAP_FEATURE_DEFAULT ( WNI_CFG_VHT_SU_BEAMFORMEE_CAP_STADEF )
+
+#define CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED         "gTxBFCsnValue"
+#define CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_MIN     ( WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STAMIN )
+#define CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_MAX     ( WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STAMAX )
+#define CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_DEFAULT ( WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STAMAX - 1)
+
 #endif
 
 
@@ -1933,6 +1939,7 @@
    v_U8_t                      vhtRxMCS;
    v_U8_t                      vhtTxMCS;
    v_BOOL_t                    enableTxBF;
+   v_U8_t                      txBFCsnValue;
 #endif
    v_U8_t                      enableModulatedDTIM;
    v_U32_t                     fEnableMCAddrList;