arm64: zynqmp: Rename ams_ps/pl node names

Fix child node names to be aligned with commit 39dd2d1e ("dt-bindings:
iio: adc: Add Xilinx AMS binding documentation") which requires names as
ams-ps@ and ams-pl@.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/373136eccf8d22cdfb499adbc8d5f5510d6c1035.1683034376.git.michal.simek@amd.com

arch/arm64/boot/dts/xilinx/zynqmp.dtsi

@@ -938,13 +938,13 @@ xilinx_ams: ams@ffa50000 {
 			#io-channel-cells = <1>;
 			ranges = <0 0 0xffa50800 0x800>;
 
-			ams_ps: ams_ps@0 {
+			ams_ps: ams-ps@0 {
 				compatible = "xlnx,zynqmp-ams-ps";
 				status = "disabled";
 				reg = <0x0 0x400>;
 			};
 
-			ams_pl: ams_pl@400 {
+			ams_pl: ams-pl@400 {
 				compatible = "xlnx,zynqmp-ams-pl";
 				status = "disabled";
 				reg = <0x400 0x400>;