sysfs, kernfs: remove cross inclusions of internal headers

fs/kernfs/kernfs-internal.h needed to include fs/sysfs/sysfs.h because
part of kernfs core implementation was living in sysfs.

fs/sysfs/sysfs.h needed to include fs/kernfs/kernfs-internal.h because
include/linux/kernfs.h didn't expose enough interface.

The separation is complete and neither is true anymore.  Remove the
cross inclusion and make sysfs a proper user of kernfs.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index f33a784..d1ff591 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -48,8 +48,6 @@
 	struct sysfs_dirent	*removed;
 };
 
-#include "../sysfs/sysfs.h"
-
 /*
  * mount.c
  */
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 6a82311..c8e395b 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -11,7 +11,6 @@
 #ifndef __SYSFS_INTERNAL_H
 #define __SYSFS_INTERNAL_H
 
-#include "../kernfs/kernfs-internal.h"
 #include <linux/sysfs.h>
 
 /*