From: Michael Werner <werner@mrcoffee.engr.sgi.com>

This patch allows drivers to allocate memory local to the bridge using
platform specific alloc_page routines.
Signed-off-by: Mike Werner <werner@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Jones <davej@redhat.com>