IXP4xx: Remove time limit for PCI TRDY to enable use of slow devices.

Signed-off-by: NKrzysztof Hałasa <khc@pm.waw.pl>

arch/arm/mach-ixp4xx/common-pci.c

@@ -410,6 +410,7 @@ void __init ixp4xx_pci_preinit(void)
 		 * Enable the IO window to be way up high, at 0xfffffc00
 		 */
 		local_write_config(PCI_BASE_ADDRESS_5, 4, 0xfffffc01);
+		local_write_config(0x40, 4, 0x000080FF); /* No TRDY time limit */
 	} else {
 		printk("PCI: IXP4xx is target - No bus scan performed\n");
 	}