qcacmn: Remove common htt.h file and add cmn enum

Remove the htt.h file inclusion from inside the cdp layer.
The upper layers should include this. Create a common
enum structure to be used inside the cdp_if layer.
Translation will take place in the DP layer.

Change-Id: I0c3e30eab54c0efafb917ddb304678a392788c2b
Crs-fixed: 1075597

dp/inc/cdp_txrx_host_stats.h

@@ -226,6 +226,6 @@ cdp_reset_lro_stats(ol_txrx_soc_handle soc, void *vdev)
 
 #if ATH_BAND_STEERING || ENHANCED_STATS
 uint32_t *ol_txrx_get_en_stats_base(ol_txrx_pdev_handle txrx_pdev, uint32_t *msg_word,
-    uint32_t msg_len, enum htt_t2h_en_stats_type *type,  enum htt_t2h_en_stats_status *status);
+    uint32_t msg_len, enum htt_cmn_t2h_en_stats_type *type,  enum htt_cmn_t2h_en_stats_status *status);
 #endif
 #endif /* _CDP_TXRX_HOST_STATS_H_ */