ia64/PCI: Remove unused 'addr' and fix build warning

Ever since commit 240504adaf07 ("ia64/PCI: Keep CPU physical (not
virtual) addresses in shadow ROM resource") 'addr' has been unused,
resulting in the following compiler warning,

arch/ia64/sn/kernel/io_acpi_init.c: In function 'sn_acpi_slot_fixup':
arch/ia64/sn/kernel/io_acpi_init.c:429:16: warning: unused variable 'addr' [-Wunused-variable]
void __iomem *addr;
^

Cc: Tony Luck <[e-mail]>
Cc: Fenghua Yu <[e-mail]>
Cc: Bjorn Helgaas <[e-mail]>
Signed-off-by: Matt Fleming <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/sn/kernel/io_acpi_init.c

···
 void
 sn_acpi_slot_fixup(struct pci_dev *dev)
 {
-	void __iomem *addr;
 	struct pcidev_info *pcidev_info = NULL;
 	struct sn_irq_info *sn_irq_info = NULL;
 	struct resource *res;