staging: lustre: namei.c: coding style: fix quoted string split across lines

This patch fixes a quoted string split across lines.

Signed-off-by: Laure Millet <laure.millet@lip6.fr>
Signed-off-by: Maxime Lorrillere <maxime.lorrillere@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>