qcacmn: Change max mgmt descriptor pool size to 64

With no queueing support in the host driver for mgmt
frames and the target  not supporting more than 64 mgmt
frames at any given time, the max number of mgmt descriptor
pools should be changes to 64

Change-Id: Ic6bb0d6a01867ba7fb0197d4cd6e406cd74d39fc
CRs-Fixed: 2146177

umac/cmn_services/mgmt_txrx/dispatcher/inc/wlan_mgmt_txrx_utils_api.h

@@ -30,7 +30,7 @@
 #include "wlan_objmgr_cmn.h"
 #include "qdf_nbuf.h"
 
-#define MGMT_DESC_POOL_MAX 512
+#define MGMT_DESC_POOL_MAX 64
 
 #define mgmt_txrx_log(level, args...) \
 			QDF_TRACE(QDF_MODULE_ID_MGMT_TXRX, level, ## args)