security: fs: make inode explicitly non-modular

The Makefile/Kconfig entry controlling compilation of this code is:

security/Makefile:obj-$(CONFIG_SECURITYFS)                += inode.o

security/Kconfig:config SECURITYFS
security/Kconfig:       bool "Enable the securityfs filesystem"

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modular infrastructure use, so that
when reading the driver there is no doubt it is builtin-only.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

The removal of module.h uncovered a couple previously hidden implicit
header requirements which are now included explicitly.

Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: James Morris <james.morris@microsoft.com>

security/inode.c

@@ -13,7 +13,8 @@
  */
 
 /* #define DEBUG */
-#include <linux/module.h>
+#include <linux/sysfs.h>
+#include <linux/kobject.h>
 #include <linux/fs.h>
 #include <linux/mount.h>
 #include <linux/pagemap.h>
@@ -341,7 +342,4 @@ static int __init securityfs_init(void)
 #endif
 	return 0;
 }
-
 core_initcall(securityfs_init);
-MODULE_LICENSE("GPL");
-