[ARM] Move prototype for register_isa_ports to asm/io.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-footbridge/dc21285.c

@@ -35,7 +35,6 @@
 
 extern int setup_arm_irq(int, struct irqaction *);
 extern void pcibios_report_status(u_int status_mask, int warn);
-extern void register_isa_ports(unsigned int, unsigned int, unsigned int);
 
 static unsigned long
 dc21285_base_address(struct pci_bus *bus, unsigned int devfn)

include/asm-arm/io.h

@@ -291,5 +291,12 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
  */
 #define xlate_dev_kmem_ptr(p)	p
 
+/*
+ * Register ISA memory and port locations for glibc iopl/inb/outb
+ * emulation.
+ */
+extern void register_isa_ports(unsigned int mmio, unsigned int io,
+			       unsigned int io_shift);
+
 #endif	/* __KERNEL__ */
 #endif	/* __ASM_ARM_IO_H */