ocfs2: Move the hb_ctl_path sysctl into the stack glue.

ocfs2 needs to call out to the hb_ctl program at unmount for all cluster
stacks.  The first step is to move the hb_ctl_path sysctl out of the
o2cb code and into the generic stack glue.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index bbd1667..fb26a7c 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -338,7 +338,7 @@
 	int ret;
 	char *argv[5], *envp[3];
 
-	argv[0] = (char *)o2nm_get_hb_ctl_path();
+	argv[0] = (char *)ocfs2_get_hb_ctl_path();
 	argv[1] = "-K";
 	argv[2] = "-u";
 	argv[3] = (char *)group;