ARC: HSDK: DTS: Add cgu-clk node

Add cgu-clk (clock generation unit) node to HSDK device tree.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/arch/arc/dts/hsdk.dts b/arch/arc/dts/hsdk.dts
index a7b276c..67dfb93 100644
--- a/arch/arc/dts/hsdk.dts
+++ b/arch/arc/dts/hsdk.dts
@@ -24,6 +24,12 @@
 		};
 	};
 
+	cgu_clk: cgu-clk@f0000000 {
+		compatible = "snps,hsdk-cgu-clock";
+		reg = <0xf0000000 0x10>, <0xf00014B8 0x4>;
+		#clock-cells = <1>;
+	};
+
 	uart0: serial0@f0005000 {
 		compatible = "snps,dw-apb-uart";
 		reg = <0xf0005000 0x1000>;