LSM: Introduce security hook calling Macros

Introduce two macros around calling the functions in the
security operations vector. The marco versions here do not
change any behavior.

Signed-off-by: Casey Schaufler <[email protected]>
Acked-by: John Johansen <[email protected]>
Acked-by: Kees Cook <[email protected]>
Acked-by: Paul Moore <[email protected]>
Acked-by:  Stephen Smalley <[email protected]>
Acked-by: Tetsuo Handa <[email protected]>
Signed-off-by: James Morris <[email protected]>

Author: cschaufler