qcacmn: print backpressure stats in work queue context

Avoid backpressure event prints in irq context and
defer work queue context

Change-Id: Ib68237d6a9930ead38f53aa89ec1d9e9a2f4147d

dp/wifi3.0/dp_internal.h

@@ -2734,4 +2734,22 @@ static inline QDF_STATUS dp_runtime_init(struct dp_soc *soc)
 }
 #endif
 
+/*
+ * dp_pdev_bkp_stats_detach() - detach resources for back pressure stats
+ *				processing
+ * @pdev: Datapath PDEV handle
+ *
+ */
+void dp_pdev_bkp_stats_detach(struct dp_pdev *pdev);
+
+/*
+ * dp_pdev_bkp_stats_attach() - attach resources for back pressure stats
+ *				processing
+ * @pdev: Datapath PDEV handle
+ *
+ * Return: QDF_STATUS_SUCCESS: Success
+ *         QDF_STATUS_E_NOMEM: Error
+ */
+
+QDF_STATUS dp_pdev_bkp_stats_attach(struct dp_pdev *pdev);
 #endif /* #ifndef _DP_INTERNAL_H_ */