wlan: Enable BMU HW tracing by default.

Currently BMU tracing is disabled by default.As per
FW requirement this needs to be enabled by default.
Also DXE channel gets open if gEnableMgmtLogging or
gEnableBMUHWtracing is enabled.For BMUTracing there will be
no packets coming to Host.
So changes are done to open the DXE channnel when
gEnableMgmtLogging is enabled.

Change-Id: I703e55ab15fee1adf46f018dffed059ccdfe0af7
CRs-Fixed: 840773
diff --git a/CORE/HDD/src/wlan_hdd_main.c b/CORE/HDD/src/wlan_hdd_main.c
index aac251d..4f3ae49 100755
--- a/CORE/HDD/src/wlan_hdd_main.c
+++ b/CORE/HDD/src/wlan_hdd_main.c
@@ -11052,8 +11052,7 @@
     pHddCtx = vos_get_context(VOS_MODULE_ID_HDD,
                               vos_get_global_context(VOS_MODULE_ID_HDD, NULL));
 
-    return (pHddCtx && (pHddCtx->cfg_ini->enableMgmtLogging ||
-                        pHddCtx->cfg_ini->enableBMUHWtracing));
+    return (pHddCtx && pHddCtx->cfg_ini->enableMgmtLogging);
 }
 
 /*