interrupts: LPC is always an interrupt controller
interrupts: LPC is always an interrupt controller

Whether we have Naples or not, the "interrupts" properties
of the child of the LPC node are always in the LPC interrupt
number space, and so should always have the LPC controller as
their interrupt controller.

Signed-off-by: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>
Acked-by: Michael Neuling <7b0ab45a730e48a69239010b5b8fe5fa4e8eaac6@neuling.org>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

shenki/skiboot,open-power/skiboot,qemu/skiboot,qemu/skiboot,open-power/skiboot,stewart-ibm/skiboot,shenki/skiboot,shenki/skiboot,legoater/skiboot,qemu/skiboot,shenki/skiboot,qemu/skiboot,open-power/skiboot,mikey/skiboot,mikey/skiboot,open-power/skiboot,legoater/skiboot,stewart-ibm/skiboot,open-power/skiboot,legoater/skiboot,legoater/skiboot,mikey/skiboot,legoater/skiboot,shenki/skiboot,qemu/skiboot,stewart-ibm/skiboot