TAKE - fix memory leak in O_DIRECT read path

[Steve Lord <lord@sgi.com>]

Leak introduced in the last direct I/O change

Date:  Tue Feb 19 13:38:06 PST 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:112081a
linux/fs/xfs/pagebuf/page_buf_io.c - 1.11
	- Remove extra hold added by last direct I/O fix, it was causing a memory
	  leak.

linux/fs/xfs/pagebuf/page_buf.c - 1.7
	- Remove the rele call from pagebuf_iostart, the only caller who could
	  get into this was direct I/O which does its own rele.