TAKE - xfs_mkfs protofile dev_t fix

[dxm@xxxxxxxxxxxxxxxxxxxxxxx (Daniel Moore)]

Make sure we generate 16 bit old style dev_t's instead
of irix ones.

I'll open a bug to clean up handling of the different
types in the kernel - it's more than a little confused.

Modid:  2.4.0-test1-xfs:slinx:67837a
Date:  Tue Jul 25 19:25:44 PDT 2000
Workarea:  snort:/build1/people/dxm/isms/slinx-xfs
Author:  dxm

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.0-test1-xfs

cmd/xfs/mkfs/xfs_mkfs.c - 1.168
        - generate correct linux user space dev_t's for devices created in 
protofiles