qcacld-3.0: Add debugfs support for roam scan stats

Add debugfs entry to get last five roam scan stats info which includes
old bssid, new bssid, roaming candidates etc., for STA interface.

Change-Id: Ied66beb270d97b6e17a6116c1be0e82783094519
CRs-Fixed: 2203885
diff --git a/core/wma/inc/wma_internal.h b/core/wma/inc/wma_internal.h
index 431c395..bd7064d 100644
--- a/core/wma/inc/wma_internal.h
+++ b/core/wma/inc/wma_internal.h
@@ -1418,4 +1418,25 @@
 
 int wma_twt_en_complete_event_handler(void *handle,
 				      uint8_t *event, uint32_t len);
+/**
+ * wma_get_roam_scan_stats() - Get roam scan stats request
+ * @handle: wma handle
+ * @req: request details
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS wma_get_roam_scan_stats(WMA_HANDLE handle,
+				   struct sir_roam_scan_stats *req);
+
+/**
+ * wma_roam_scan_stats_event_handler() - roam scan stats event handler
+ * @handle: wma handle
+ * @event: event data
+ * @len: length of data
+ *
+ * Return: Success or Failure status
+ */
+int wma_roam_scan_stats_event_handler(void *handle, uint8_t *event,
+				      uint32_t len);
+
 #endif