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

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -1240,6 +1240,7 @@ vpu: video-codec@ff650000 {
 		reg = <0x0 0xff650000 0x0 0x800>;
 		interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH 0>,
 			     <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH 0>;
+		interrupt-names = "vepu", "vdpu";
 		clocks = <&cru ACLK_VCODEC>, <&cru HCLK_VCODEC>;
 		clock-names = "aclk", "hclk";
 		iommus = <&vpu_mmu>;