qcacmn: Handle the duplicate entries in reo exception ring

We have come across scenarios where rxdma is pushing
a certain entry more than once to the reo exception
ring. In this scenario, when we try to unmap a buffer,
it can lead to multiple unmap of the same buffer.

Handle this case, by skipping the process of this
duplicate entry, if alrady unmapped, and proceed to the
next entry.

Change-Id: Iae66f27e432f795ba4730911029fa1d63a75cb06
CRs-Fixed: 2739176

dp/wifi3.0/dp_rx.h

@@ -721,6 +721,20 @@ void dp_rx_deliver_raw(struct dp_vdev *vdev, qdf_nbuf_t nbuf_list,
 				struct dp_peer *peer);
 
 #ifdef RX_DESC_DEBUG_CHECK
+/**
+ * dp_rx_desc_paddr_sanity_check() - paddr sanity for ring desc vs rx_desc
+ * @rx_desc: rx descriptor
+ * @ring_paddr: paddr obatined from the ring
+ *
+ * Returns: QDF_STATUS
+ */
+static inline
+bool dp_rx_desc_paddr_sanity_check(struct dp_rx_desc *rx_desc,
+				   uint64_t ring_paddr)
+{
+	return (ring_paddr == qdf_nbuf_get_frag_paddr(rx_desc->nbuf, 0));
+}
+
 /*
  * dp_rx_desc_alloc_dbg_info() - Alloc memory for rx descriptor debug
  *  structure
@@ -775,6 +789,13 @@ void dp_rx_desc_update_dbg_info(struct dp_rx_desc *rx_desc,
 }
 #else
 
+static inline
+bool dp_rx_desc_paddr_sanity_check(struct dp_rx_desc *rx_desc,
+				   uint64_t ring_paddr)
+{
+	return true;
+}
+
 static inline
 void dp_rx_desc_alloc_dbg_info(struct dp_rx_desc *rx_desc)
 {