sparc64: Kill isa_bus_type.

I forgot to delete this when I removed the ISA bus layer
from the sparc ports.
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/of_platform_64.h

@@ -16,7 +16,6 @@
 /* This is just here during the transition */
 #include <linux/of_platform.h>
 
-extern struct bus_type isa_bus_type;
 extern struct bus_type ebus_bus_type;
 extern struct bus_type sbus_bus_type;
 

arch/sparc64/kernel/of_device.c

@@ -56,9 +56,6 @@ struct of_device *of_find_device_by_node(struct device_node *dp)
 EXPORT_SYMBOL(of_find_device_by_node);
 
 #ifdef CONFIG_PCI
-struct bus_type isa_bus_type;
-EXPORT_SYMBOL(isa_bus_type);
-
 struct bus_type ebus_bus_type;
 EXPORT_SYMBOL(ebus_bus_type);
 #endif
@@ -841,8 +838,6 @@ static int __init of_bus_driver_init(void)
 
 	err = of_bus_type_init(&of_platform_bus_type, "of");
 #ifdef CONFIG_PCI
-	if (!err)
-		err = of_bus_type_init(&isa_bus_type, "isa");
 	if (!err)
 		err = of_bus_type_init(&ebus_bus_type, "ebus");
 #endif