qcacmn: Enable ENABLE_DP_HIST_STATS macro

This macro ENABLE_DP_HIST_STATS is needed for histogram information in
DP layer for both TX and RX. Add support for this macro.

Change-Id: Iffcb93c5e19d667bae35ce562c7ef12d063fb659
CRs-Fixed: 2492090

dp/inc/cdp_txrx_mob_def.h

@@ -22,6 +22,7 @@
 #include <htt.h>
 
 #define TX_WMM_AC_NUM	4
+#define ENABLE_DP_HIST_STATS
 
 #define OL_TXQ_PAUSE_REASON_FW                (1 << 0)
 #define OL_TXQ_PAUSE_REASON_PEER_UNAUTHORIZED (1 << 1)