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, 1 insertions, 0 deletions

diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst
index af77a7bbb070..3296533e54cf 100644
--- a/Documentation/security/tpm/index.rst
+++ b/Documentation/security/tpm/index.rst
@@ -5,3 +5,4 @@ Trusted Platform Module documentation
 .. toctree::
 
    tpm_vtpm_proxy
+   xen-tpmfront