kernel/ksysfs.c: Call ksysfs_init() early when CONFIG_INITCALL_ASYNC=y

configfs_init()/debugfs_init() depends on ksysfs_init() to init kernel_kobj.
But configfs_init()/debugfs_init() and ksysfs_init() are both in the same
core_initcall level.

Fix this by move ksysfs_init() to the pure_initcall level.

Change-Id: Iaa23a25a59b3a133f3cecb396fc69dd7e65d45ad
Signed-off-by: Tao Huang <huangtao@rock-chips.com>

kernel/ksysfs.c

@@ -270,4 +270,8 @@ exit:
 	return error;
 }
 
+#ifdef CONFIG_INITCALL_ASYNC
+pure_initcall(ksysfs_init);
+#else
 core_initcall(ksysfs_init);
+#endif