unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index bfd6787..7078052 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -200,6 +200,7 @@
 /* fanotify! */
 cond_syscall(sys_fanotify_init);
 cond_syscall(sys_fanotify_mark);
+cond_syscall(compat_sys_fanotify_mark);
 
 /* open by handle */
 cond_syscall(sys_name_to_handle_at);