arm64: dts: rockchip: Re-add interrupt-names for RK3399's vpu

arm64: dts: rockchip: Re-add interrupt-names for RK3399's vpu

Commit 53a05c8f6e8e ("arm64: dts: rockchip: remove interrupt-names from iommu nodes")
intended to remove the interrupt-names property for mmu nodes, but it
also removed it for the vpu node in rk3399.dtsi. That makes the driver
fail probing currently.
Fix this by re-adding the property for this node.

Fixes: 53a05c8f6e8e ("arm64: dts: rockchip: remove interrupt-names from iommu nodes")
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Link: https://lore.kernel.org/r/20210822115755.3171937-1-knaerzche@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>