bnxt_en: Add event handler for PAUSE Storm event

FW has been modified to send a new async event when it detects
a pause storm. Register for this new event and log it upon receipt.
Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -2049,6 +2049,9 @@ static void bnxt_event_error_report(struct bnxt *bp, u32 data1, u32 data2)
 		netdev_err(bp->dev, "1PPS: Received invalid signal on pin%lu from the external source. Please fix the signal and reconfigure the pin\n",
 			   BNXT_EVENT_INVALID_SIGNAL_DATA(data2));
 		break;
+	case ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_PAUSE_STORM:
+		netdev_warn(bp->dev, "Pause Storm detected!\n");
+		break;
 	default:
 		netdev_err(bp->dev, "FW reported unknown error type\n");
 		break;