arm64: zynqmp: Replace '-' by '_' in fixed clock nodes

Using '_' in node name is not recommended that's why convert them to use
'-' instead.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/3979167636f0a5970a9ab642a4e0ea6a46b3f8d7.1704705872.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp-vp-x-a2785-00-revA.dts b/arch/arm/dts/zynqmp-vp-x-a2785-00-revA.dts
index 088545c..2a3bbe1 100644
--- a/arch/arm/dts/zynqmp-vp-x-a2785-00-revA.dts
+++ b/arch/arm/dts/zynqmp-vp-x-a2785-00-revA.dts
@@ -65,19 +65,19 @@
 		};
 	};
 
-	si5332_0: si5332_0 { /* ps_ref_clk - u142 */
+	si5332_0: si5332-0 { /* ps_ref_clk - u142 */
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <33333333>;
 	};
 
-	si5332_1: si5332_1 { /* clk0_sgmii - u142 */
+	si5332_1: si5332-1 { /* clk0_sgmii - u142 */
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <33333333>; /* FIXME */
 	};
 
-	si5332_2: si5332_2 { /* clk1_usb - u142 */
+	si5332_2: si5332-2 { /* clk1_usb - u142 */
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <27000000>;