Revert "qcacld-3.0: Change default value of CSN to 4"

This reverts commit I814e10cc7da176dd12c154b8870b4d261ebb4789.

Change-Id: I148e0ffcc6e3de372b0f52dd8fd85f5af5b55b7b
CRs-Fixed: 2247688

core/mac/inc/wni_cfg.h

@@ -920,7 +920,7 @@ enum {
 
 #define WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STAMIN    0
 #define WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STAMAX    8
-#define WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STADEF    4
+#define WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_STADEF    8
 /*
  * WNI_CFG_VHT_CSN_BEAMFORMEE_ANT_SUPPORTED_FW_DEF + 1 is
  * assumed to be the default fw supported BF antennas, if fw