PCI: fix pci_ioremap_bar() on s390

s390 doesn't have ioremap_*, so protect the definition of the new
pci_ioremap_bar function with CONFIG_HAS_IOMEM to avoid build breakage.

Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

include/linux/pci.h

@@ -1119,6 +1119,7 @@ static inline void pci_mmcfg_early_init(void) { }
 static inline void pci_mmcfg_late_init(void) { }
 #endif
 
+#ifdef CONFIG_HAS_IOMEM
 static inline void * pci_ioremap_bar(struct pci_dev *pdev, int bar)
 {
 	/*
@@ -1131,6 +1132,7 @@ static inline void * pci_ioremap_bar(struct pci_dev *pdev, int bar)
 	return ioremap_nocache(pci_resource_start(pdev, bar),
 				     pci_resource_len(pdev, bar));
 }
+#endif
 
 #endif /* __KERNEL__ */
 #endif /* LINUX_PCI_H */