lsm: move hook comments docs to security/security.c

Fix one kernel-doc warning, but invesigating that led to other
kernel-doc movement (lsm_hooks.h to security.c) that needs to be
fixed also.

include/linux/lsm_hooks.h:1: warning: no structured comments found

Fixes: e261301c ("lsm: move the remaining LSM hook comments to security/security.c")
Fixes: 1cd2aca6 ("lsm: move the io_uring hook comments to security/security.c")
Fixes: 452b670c ("lsm: move the perf hook comments to security/security.c")
Fixes: 55e85320 ("lsm: move the bpf hook comments to security/security.c")
Fixes: b14faf9c ("lsm: move the audit hook comments to security/security.c")
Fixes: 1427ddbe ("lsm: move the binder hook comments to security/security.c")
Fixes: 43fad282 ("lsm: move the sysv hook comments to security/security.c")
Fixes: ecc419a4 ("lsm: move the key hook comments to security/security.c")
Fixes: 742b9945 ("lsm: move the xfrm hook comments to security/security.c")
Fixes: ac318aed ("lsm...