[S390] qdio: re-add lost perf_stats.tl_runs change in qdio_handle_pci

Statement has been inadvertently lost with commit
00c0c6466c66bdf05f2a3dcf59e6895179ea8b76.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/qdio.c

@@ -1983,6 +1983,7 @@ qdio_handle_pci(struct qdio_irq *irq_ptr)
 		if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
 			qdio_mark_q(q);
 		else {
+			qdio_perf_stat_dec(&perf_stats.tl_runs);
 			__qdio_inbound_processing(q);
 		}
 	}