arm64: dts: ti: k3-am654: Add interrupt controllers in wakeup domain

Wakeup domain in AM654 SoC has an interrupt router connected to gpio
in wakeup domain. Add DT node for this interrupt router.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>