docs: security: move some books to it and update

The following files belong to security:

  Documentation/security/LSM.rst -> Documentation/security/lsm-development.rst
  Documentation/lsm.txt -> Documentation/security/lsm.rst
  Documentation/SAK.txt -> Documentation/security/sak.rst
  Documentation/siphash.txt -> Documentation/security/siphash.rst

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/Documentation/security/tpm/xen-tpmfront.rst b/Documentation/security/tpm/xen-tpmfront.rst
index 98a16ab87360..00d5b1db227d 100644
--- a/Documentation/security/tpm/xen-tpmfront.rst
+++ b/Documentation/security/tpm/xen-tpmfront.rst
@@ -1,5 +1,3 @@
-:orphan:
-
 =============================
 Virtual TPM interface for Xen
 =============================