dts: arm: silabs: xg21: Reformat dtsi files

Reformat devicetree files:

* Sort nodes by unit address or name
* Sort properties by category and name

Signed-off-by: Aksel Skauge Mellbye <[email protected]>

Author: asmellby

dts/arm/silabs/xg21/efr32mg21a020f1024im32.dtsi

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2019 Steven Lemaire
+ * Copyright (c) 2025 Silicon Laboratories Inc.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -9,12 +10,13 @@
 
 / {
 	soc {
-		compatible = "silabs,efr32mg21a020f1024im32", "silabs,efr32mg21", "silabs,efr32", "simple-bus";
+		compatible = "silabs,efr32mg21a020f1024im32", "silabs,efr32mg21", "silabs,xg21",
+			     "silabs,efr32", "simple-bus";
 	};
 };
 
 &flash0 {
-	reg = <0 DT_SIZE_K(1024)>;
+	reg = <0x00000000 DT_SIZE_K(1024)>;
 };
 
 &sram0 {

dts/arm/silabs/xg21/efr32xg21.dtsi

@@ -10,15 +10,15 @@
 	soc {
 		radio: radio@b0000000 {
 			compatible = "silabs,series2-radio";
-			reg = <0xb0000000 0x1000000>;
-			interrupts = <31 1>, <32 1>, <33 1>, <34 1>, <35 1>, <36 1>,
-				     <37 1>, <38 1>, <39 1>, <40 1>;
+			reg = <0xb0000000 0x01000000>;
 			interrupt-names = "agc", "bufc", "frc_pri", "frc", "modem", "protimer",
 					  "rac_rsm", "rac_seq", "prortc", "synth";
+			interrupts = <31 1>, <32 1>, <33 1>, <34 1>, <35 1>, <36 1>, <37 1>,
+				     <38 1>, <39 1>, <40 1>;
+			pa-2p4ghz = "highest";
 			pa-initial-power-dbm = <10>;
 			pa-ramp-time-us = <10>;
 			pa-voltage-mv = <3300>;
-			pa-2p4ghz = "highest";
 
 			pti: pti {
 				compatible = "silabs,pti";