[IA64] eliminate compile time warnings

This patch removes following compile time warnings:

drivers/pci/pci-sysfs.c: In function `pci_read_legacy_io':
drivers/pci/pci-sysfs.c:257: warning: implicit declaration of function `ia64_pci_legacy_read'
drivers/pci/pci-sysfs.c: In function `pci_write_legacy_io':
drivers/pci/pci-sysfs.c:280: warning: implicit declaration of function `ia64_pci_legacy_write'

It also fixes wrong definition of ia64_pci_legacy_write (type of `bus' is not
`pci_dev', but `pci_bus').
Signed-Off-By: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/pci/pci.c

@@ -31,7 +31,6 @@
 #include <asm/irq.h>
 #include <asm/hw_irq.h>
 
-
 /*
  * Low-level SAL-based PCI configuration access functions. Note that SAL
  * calls are already serialized (via sal_lock), so we don't need another
@@ -707,7 +706,7 @@ int ia64_pci_legacy_read(struct pci_bus *bus, u16 port, u32 *val, u8 size)
  *
  * Simply writes @size bytes of @val to @port.
  */
-int ia64_pci_legacy_write(struct pci_dev *bus, u16 port, u32 val, u8 size)
+int ia64_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size)
 {
 	int ret = size;
 

include/asm-ia64/machvec.h

@@ -347,9 +347,11 @@ extern ia64_mv_dma_supported		swiotlb_dma_supported;
 #endif
 #ifndef platform_pci_legacy_read
 # define platform_pci_legacy_read	ia64_pci_legacy_read
+extern int ia64_pci_legacy_read(struct pci_bus *bus, u16 port, u32 *val, u8 size);
 #endif
 #ifndef platform_pci_legacy_write
 # define platform_pci_legacy_write	ia64_pci_legacy_write
+extern int ia64_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size);
 #endif
 #ifndef platform_inb
 # define platform_inb		__ia64_inb