s390/pci: cleanup function names

Rename s390pci_xyz to zpci_xxz and set_irq_ctrl to zpci_set_irq_ctrl.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index a2343c1..2125310 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -170,8 +170,8 @@
 		 */
 		goto no_refresh;
 
-	rc = s390pci_refresh_trans((u64) zdev->fh << 32, start_dma_addr,
-				   nr_pages * PAGE_SIZE);
+	rc = zpci_refresh_trans((u64) zdev->fh << 32, start_dma_addr,
+				nr_pages * PAGE_SIZE);
 
 no_refresh:
 	spin_unlock_irqrestore(&zdev->dma_table_lock, irq_flags);