arm64: dts: rockchip: fix iface clock-name on px30 iommus

The iommu clock names are aclk+iface not aclk+hclk as in the vendor kernel,
so fix that in the px30.dtsi
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20190917082659.25549-1-heiko@sntech.de

arch/arm64/boot/dts/rockchip/px30.dtsi

@@ -831,7 +831,7 @@ vopb_mmu: iommu@ff460f00 {
 		interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-names = "vopb_mmu";
 		clocks = <&cru ACLK_VOPB>, <&cru HCLK_VOPB>;
-		clock-names = "aclk", "hclk";
+		clock-names = "aclk", "iface";
 		power-domains = <&power PX30_PD_VO>;
 		#iommu-cells = <0>;
 		status = "disabled";
@@ -863,7 +863,7 @@ vopl_mmu: iommu@ff470f00 {
 		interrupts = <GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-names = "vopl_mmu";
 		clocks = <&cru ACLK_VOPL>, <&cru HCLK_VOPL>;
-		clock-names = "aclk", "hclk";
+		clock-names = "aclk", "iface";
 		power-domains = <&power PX30_PD_VO>;
 		#iommu-cells = <0>;
 		status = "disabled";