Microchip: MEC172X DTS files reorganization

MEC172X series SoCs share most IP but the -LJ series expands the PWM and
ADC channels available as well as defines extra pinctrl pins.
Separating these better to be able to simplify their inclusion and
driver code.  Any board based on either the -SZ or -LJ package can just
include the mec172x<sz/lj> dtsi files for their specific package.

(cherry picked from commit 13a8708)

Original-Signed-off-by: Jeff Daly <jeffd@silicom-usa.com>
GitOrigin-RevId: 13a8708
Change-Id: I6472335006e9ca46e8f6c86ac23a004777e6aac8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/4962172
Tested-by: Al Semjonovs <asemjonovs@google.com>
Commit-Queue: Al Semjonovs <asemjonovs@google.com>
Reviewed-by: Fabio Baltieri <fabiobaltieri@google.com>
Reviewed-by: Al Semjonovs <asemjonovs@google.com>

dts/arm/microchip/mec1727nsz.dtsi

@@ -11,16 +11,55 @@
 #include <zephyr/dt-bindings/clock/mchp_xec_pcr.h>
 #include <zephyr/dt-bindings/interrupt-controller/mchp-xec-ecia.h>
 
-#include "mec172xnsz.dtsi"
 #include "mec172x/mec172x-vw-routing.dtsi"
 
 #include <mem.h>
 #include <freq.h>
 
 / {
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-m4";
+			reg = <0>;
+			cpu-power-states = <&idle &suspend_to_ram>;
+		};
+
+		power-states {
+			idle: idle {
+				compatible = "zephyr,power-state";
+				power-state-name = "suspend-to-idle";
+				min-residency-us = <1000000>;
+			};
+
+			suspend_to_ram: suspend_to_ram {
+				compatible = "zephyr,power-state";
+				power-state-name = "suspend-to-ram";
+				min-residency-us = <2000000>;
+			};
+		};
+	};
+
+	flash0: flash@c0000 {
+		reg = <0x000C0000 0x58000>;
+	};
+
 	flash1: flash@60000000 {
 		reg = <0x60000000 0x80000>;
 	};
+
+	sram0: memory@118000 {
+		compatible = "mmio-sram";
+		reg = <0x00118000 0x10000>;
+	};
+
+	soc {
+		#include "mec172x_common.dtsi"
+	};
+
 };
 
 &spi0 {

dts/arm/microchip/mec172x/mec172xnlj-pinctrl.dtsi

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#include <zephyr/dt-bindings/pinctrl/mchp-xec-pinctrl.h>
+#include "mec172xnsz-pinctrl.dtsi"
 
 &pinctrl {