[PATCH] PPC64: Fix LPAR IOMMU setup code for p630

[PATCH] PPC64: Fix LPAR IOMMU setup code for p630

Here's a fix to deal with p630 systems in LPAR mode.  They're to date the
only system that in some cases might lack a dma-window property for the
bus, but contain an overriding property in the device node for the specific
adapter/slot.  This makes the device setup code a bit more complex since it
needs to do some of the things that the bus setup code has already done.

Signed-off-by: Olof Johansson <olof@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@osdl.org>