TAKE - optimization in unlock code

[Steve Lord <lord@xxxxxxx>]

Too many calls into a transaction path when unlocking an
inode, we only need to do this is we are unlocking the
ilock.

Date:  Sat Jun  8 05:16:31 PDT 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.2.4

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:121116a
linux/fs/xfs/xfs_iget.c - 1.160
        - If we are not dropping the ilock there is no need to call the
          transaction system.