arm: fix compile failure in orion5x/dns323-setup.c

Upstream commit d5341942d784134f2997b3ff82cd63cf71d1f932 "PCI: Make the
struct pci_dev * argument of pci_fixup_irqs const." leaked an extra
"const" into an actual call site (vs a proto/decl) which causes this:

arch/arm/mach-orion5x/dns323-setup.c: In function 'dns323_pci_map_irq':
arch/arm/mach-orion5x/dns323-setup.c:80: error: expected expression before 'const'
arch/arm/mach-orion5x/dns323-setup.c:80: error: too few arguments to function 'orion5x_pci_map_irq'
make[3]: *** [arch/arm/mach-orion5x/dns323-setup.o] Error 1

Signed-off-by: Paul Gortmaker <[e-mail]>
Acked-by: Nicolas Pitre <[e-mail]>
Acked-by: Ralf Baechle <[e-mail]>

arch/arm/mach-orion5x/dns323-setup.c

···
 	/*
 	 * Check for devices with hard-wired IRQs.
 	 */
-	irq = orion5x_pci_map_irq(const dev, slot, pin);
+	irq = orion5x_pci_map_irq(dev, slot, pin);
 	if (irq != -1)
 		return irq;