wlan:Change csn value of beamformer antennas supported to 3

The driver advertise the incorrect csn value in the VHT capability.
Modify the driver to sets the compressed steering number of beamformer
antenna supported from default value zero to 3.

Change-Id: Ie7509c0e32f05007cf4049680c7bdeeaf0e18f7c
CR-Fixed:442942
diff --git a/CORE/MAC/src/cfg/cfgUtil/cfg.txt b/CORE/MAC/src/cfg/cfgUtil/cfg.txt
index bb1fcf9..0480a37 100644
--- a/CORE/MAC/src/cfg/cfgUtil/cfg.txt
+++ b/CORE/MAC/src/cfg/cfgUtil/cfg.txt
@@ -2840,15 +2840,15 @@
 
 *
 * Compressed Steering Number of Beamformer Antennas Supported
-* Riva/Pronto does not support, default set to 0
+* Riva does not support,Pronto supports, default set to 0
 *
 WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED  I    4    19
 V    RW    NP    
 LIM
-0    1    0
+0    3    0
 V    RW    NP    
 LIM
-0    1    0
+0    3    0
 
 *
 * Number of Sounding Dimensions indicates Number
@@ -2858,10 +2858,10 @@
 WNI_CFG_VHT_NUM_SOUNDING_DIMENSIONS  I    4    19
 V    RW    NP    
 LIM
-0    1    0
+0    3    0
 V    RW    NP    
 LIM
-0    1    0
+0    3    0
 
 *
 * MU Beamformer Capable