qcacmn: Add rx_errors stats

Update rx error stats. It is a summation of below failures:
 - desc_alloc_failure [No free desc available]
 - csum error [IP/TCP_UDP]
These failure stats are updated at pdev level and no need
to aggregate this.Directly add at pdev level and export.

Change-Id: I0a5fa8f972babf092163f3cb2d0093547ded4877
CRs-Fixed: 2496037

dp/inc/cdp_txrx_cmn_struct.h

@@ -1396,6 +1396,7 @@ struct cdp_tx_completion_ppdu {
  * @tx_dropped: Tx dropped is same as tx errors as above
  * @rx_packets: Rx total packets transmitted
  * @rx_bytes  : Rx total bytes transmitted
+ * @rx_errors : Rx erros
  */
 struct cdp_dev_stats {
 	uint32_t tx_packets;
@@ -1404,6 +1405,7 @@ struct cdp_dev_stats {
 	uint32_t tx_dropped;
 	uint32_t rx_packets;
 	uint32_t rx_bytes;
+	uint32_t rx_errors;
 };
 
 /**

dp/wifi3.0/dp_main.c

@@ -6830,6 +6830,12 @@ static void dp_pdev_getstats(void *pdev_handle,
 	stats->rx_bytes = pdev->stats.rx.unicast.bytes +
 		pdev->stats.rx.multicast.bytes +
 		pdev->stats.rx.bcast.bytes;
+	stats->rx_errors = pdev->stats.err.desc_alloc_fail +
+		pdev->stats.err.ip_csum_err +
+		pdev->stats.err.tcp_udp_csum_err +
+		pdev->stats.rx.err. mic_err +
+		pdev->stats.rx.err. decrypt_err +
+		pdev->stats.rx.err. fcserr;
 }
 
 /**