dts: arm: nxp_mcxn947: Added lptmr Node in dts

Added a single instance lptmr node on the
mcxn947 soc dts. Updated counter lptmr to
have max value property.

Signed-off-by: Emilio Benavente <emilio.benavente@nxp.com>

dts/arm/nxp/nxp_ke1xf.dtsi

@@ -290,6 +290,7 @@
 			clock-frequency = <128000>;
 			prescaler = <1>;
 			clk-source = <1>;
+			resolution = <16>;
 		};
 
 		wdog: watchdog@40052000 {

dts/arm/nxp/nxp_mcxn94x_common.dtsi

@@ -894,6 +894,16 @@
 		clk-source = <0>;
 		status = "disabled";
 	};
+
+	lptmr0: lptmr@4a000 {
+		compatible = "nxp,lptmr";
+		reg = <0x4a000 0x1000>;
+		interrupts = <143 0>;
+		clock-frequency = <16000>;
+		prescaler = <1>;
+		clk-source = <1>;
+		resolution = <32>;
+	};
 };
 
 &systick {

dts/bindings/counter/nxp,lptmr.yaml

@@ -29,3 +29,8 @@ properties:
   active-low:
     type: boolean
     description: Pulse counter input pin is active-low
+
+  resolution:
+    type: int
+    required: true
+    description: Represents the width of the timer in bits.