s390/pci: Use for_pci_msi_entry() to access MSI device list

Use accessor for_each_pci_msi_entry() to access MSI device list, so we could
easily move msi_list from struct pci_dev into struct device later.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Stuart Yoder <stuart.yoder@freescale.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Link: http://lkml.kernel.org/r/1436428847-8886-5-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/s390/pci/pci.c

@@ -414,7 +414,7 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 
 	/* Request MSI interrupts */
 	hwirq = 0;
-	list_for_each_entry(msi, &pdev->msi_list, list) {
+	for_each_pci_msi_entry(msi, pdev) {
 		rc = -EIO;
 		irq = irq_alloc_desc(0);	/* Alloc irq on node 0 */
 		if (irq < 0)
@@ -440,7 +440,7 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 	return (msi_vecs == nvec) ? 0 : msi_vecs;
 
 out_msi:
-	list_for_each_entry(msi, &pdev->msi_list, list) {
+	for_each_pci_msi_entry(msi, pdev) {
 		if (hwirq-- == 0)
 			break;
 		irq_set_msi_desc(msi->irq, NULL);
@@ -470,7 +470,7 @@ void arch_teardown_msi_irqs(struct pci_dev *pdev)
 		return;
 
 	/* Release MSI interrupts */
-	list_for_each_entry(msi, &pdev->msi_list, list) {
+	for_each_pci_msi_entry(msi, pdev) {
 		if (msi->msi_attrib.is_msix)
 			__pci_msix_desc_mask_irq(msi, 1);
 		else