[MIPS] Au1000: set the PCI controller IO base

The PCI controller IO base was not set in the au1000 pci code.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/au1000/common/pci.c

@@ -74,6 +74,7 @@ static int __init au1x_pci_setup(void)
 		printk(KERN_ERR "Unable to ioremap pci space\n");
 		return 1;
 	}
+	au1x_controller.io_map_base = virt_io_addr;
 
 #ifdef CONFIG_DMA_NONCOHERENT
 	{