rapidio: add outbound window support

rapidio: add outbound window support

Add RapidIO controller (mport) outbound window configuration operations.
  This patch is a part of the original patch submitted by Li Yang
  (https://lists.ozlabs.org/pipermail/linuxppc-dev/2009-April/071210.html).
  For some reason the original part was not applied to mainline code
  tree.  The inbound window mapping part has been applied later during
  tsi721 mport driver submission.  Now goes the second part with
  corresponding HW support.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>