lsm: styling fixes to security/security.c

As we were already making massive changes to security/security.c by
moving all of the function header comments above the function
definitions, let's take the opportunity to fix various style crimes.

Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

Author: pcmoore