[PATCH] powerpc: Support new property called interrupt-parents

[Paul Mackerras]

Stuart Yoder writes:

> Support new property called interrupt-parents.  This enables the
> description of devices that have multiple interrupts that are routed to
> different interrupt controllers.

I think we can get the same effect by using an interrupt-map property
in the node, with the node's interrupt-parent pointing to itself.
That way we can just use the existing interrupt-map parsing code.

Paul.