ARC: [TB10x] Adapt device tree to new compatible string

The original device tree was written using a slightly different
implementation of the fixed-factor-clock device tree binding. The
compatible string must be modified in order to be compatible with the
new implementation.
Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/boot/dts/abilis_tb10x.dtsi

@@ -53,13 +53,13 @@ pll0: oscillator {
 			clock-output-names = "pll0";
 		};
 		cpu_clk: clkdiv_cpu {
-			compatible = "fixed-factor-clkdiv";
+			compatible = "fixed-factor-clock";
 			#clock-cells = <0>;
 			clocks = <&pll0>;
 			clock-output-names = "cpu_clk";
 		};
 		ahb_clk: clkdiv_ahb {
-			compatible = "fixed-factor-clkdiv";
+			compatible = "fixed-factor-clock";
 			#clock-cells = <0>;
 			clocks = <&pll0>;
 			clock-output-names = "ahb_clk";