arm64: dts: rockchip: remove interrupt-names from iommu nodes

The iommu driver gets the interrupts by platform_get_irq(),
so remove interrupt-names property from iommu nodes.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210711143430.14347-2-jbx6244@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>