TAKE - Bring the XFS write path back into line with the generic case

[Steve Lord <lord@xxxxxxx>]

Really just code cleanup.

Date:  Wed Oct 10 12:07:39 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:104298a
linux/fs/xfs/linux/xfs_lrw.c - 1.113
        - Deal with ioflags in a cleaner manner

linux/fs/xfs/linux/xfs_file.c - 1.48
        - Replicate file offset checks from generic_file_write into the xfs
          path. Deal with ioflags in a cleaner manner.

linux/fs/pagebuf/page_buf_io.c - 1.100
        - Remove file offset checking - moved higher up the call chain