TAKE - back out sparse nfs files fix

[Steve Lord <lord@xxxxxxx>]

This fix was working for me without problems, but it was driving Andi Kleen
up the wall, and our own internal regression tests finally tripped it to.
I will rework the nfs fix another way.

Date:  Tue Jul 10 06:59:30 PDT 2001
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:98516a
linux/fs/pagebuf/page_buf_io.c - 1.89
        - Remove the 'fix' for sparse files written by nfs, this broke other
          things by creating pages beyond the end of file.