LU-4629 obdclass: fix use after release

LU-4629 obdclass: fix use after release

Pointer 'type->typ_name' checked for NULL at line 195 will be passed
to function and may be dereferenced there by passing argument 1 to
function 'lprocfs_try_remove_proc_entry' at line 246.

Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Change-Id: I697ffab97a5bd1ab55339722d87a3dfca5c1e173
Reviewed-on: http://review.whamcloud.com/9388
Tested-by: Jenkins
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>