kobject: convert /sys/firmware/acpi/ to use kobject_create

We don't need a kset here, a simple kobject will do just fine, so
dynamically create the kobject and use it.

Cc: Kay Sievers <[e-mail]>
Cc: Len Brown <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/acpi/bus.c

···
 	return -ENODEV;
 }
 
-decl_subsys(acpi, NULL);
+struct kobject *acpi_kobj;
 
 static int __init acpi_init(void)
 {
···
 		return -ENODEV;
 	}
 
-	result = firmware_register(&acpi_subsys);
-	if (result < 0)
-		printk(KERN_WARNING "%s: firmware_register error: %d\n",
-			__FUNCTION__, result);
+	acpi_kobj = kobject_create_and_add("acpi", &firmware_kset->kobj);
+	if (!acpi_kobj) {
+		printk(KERN_WARNING "%s: kset create error\n", __FUNCTION__);
+		acpi_kobj = NULL;
+	}
 
 	result = acpi_bus_init();
 

drivers/acpi/system.c

···
 	int table_index = 0;
 	int result;
 
-	tables_kobj.parent = &acpi_subsys.kobj;
+	tables_kobj.parent = acpi_kobj;
 	kobject_set_name(&tables_kobj, "tables");
 	result = kobject_register(&tables_kobj);
 	if (result)

include/acpi/acpi_bus.h

···
 	u32 data;
 };
 
-extern struct kset acpi_subsys;
+extern struct kobject *acpi_kobj;
 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 /*
  * External Functions