staging: lustre: remove last two users of ldebugfs_register()

staging: lustre: remove last two users of ldebugfs_register()

ldebugfs_register() is just a call to debugfs_create_dir() and
ldebugfs_add_vars() if the list option is set.  Fix up the last two
users of this function to just call these two functions instead, and
delete the now unused ldebugfs_register() call.

This ends up cleaning up more code and making things smaller, always a
good thing.

Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: James Simmons <jsimmons@infradead.org>
Cc: NeilBrown <neilb@suse.com>
Cc: Ben Evans <bevans@cray.com>
Cc: Quentin Bouget <quentin.bouget@cea.fr>
Cc: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Arushi Singhal <arushisinghal19971997@gmail.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Mathias Rav <mathiasrav@gmail.com>
Cc: Dafna Hirschfeld <dafna3@gmail.com>
Cc: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
Cc: Patrick Farrell <paf@cray.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: lustre-devel@lists.lustre.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>