staging: lustre: llite: don't call make_bad_inode() on an old inode

In ll_iget() if ll_update_inode() fails then do not call
make_bad_inode() on the inode since it may still be in use.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5468
Reviewed-on: http://review.whamcloud.com/11609


Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>