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.c

@@ -1840,8 +1840,7 @@ QDF_STATUS dp_rx_desc_nbuf_sanity_check(hal_ring_desc_t ring_desc,
 
 	hal_rx_reo_buf_paddr_get(ring_desc, &hbi);
 	/* Sanity check for possible buffer paddr corruption */
-	if ((&hbi)->paddr ==
-			  qdf_nbuf_get_frag_paddr(rx_desc->nbuf, 0))
+	if (dp_rx_desc_paddr_sanity_check(rx_desc, (&hbi)->paddr))
 		return QDF_STATUS_SUCCESS;
 
 	return QDF_STATUS_E_FAILURE;