TAKE - clean up the check frozen interface

[Stephen Lord <lord@localhost.localdomain.sgi.com>]

Another cleanup from Christoph, and remove the extra write superblock
from the unfreeze path.

Date:  Thu Jul 11 08:51:54 PDT 2002
Workarea:  cf-vpn-sw-corp-64-4.corp.sgi.com:/home/lord/src/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:122847a
linux/fs/xfs/xfs_mount.h - 1.148
linux/fs/xfs/xfs_mount.c - 1.289
linux/fs/xfs/xfs_trans.c - 1.133
linux/fs/xfs/xfs_fsops.c - 1.81
linux/fs/xfs/linux/xfs_lrw.c - 1.157