staging/lustre/llite: missing last bit in ll_have_md_lock

Missing the last bit during INODELOCK check in ll_have_md_lock.

Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3385
Lustre-change: http://review.whamcloud.com/6438


Signed-off-by: wang di <di.wang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>