dts: nxp_lpc_lpadc: Make clk props optional

These properties should eventually be removed from this binding as they
have been introduced to control soc specific clock trees and don't
correlate to anything in the IP, but for now just make them not required
and remove them from DT for SOCs that don't even use them.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

dts/arm/nxp/nxp_mcxn94x_common.dtsi

@@ -830,8 +830,6 @@
 		reg = <0x10d000 0x1000>;
 		interrupts = <45 0>;
 		status = "disabled";
-		clk-divider = <1>;
-		clk-source = <0>;
 		voltage-ref= <1>;
 		calibration-average = <128>;
 		power-level = <0>;
@@ -847,8 +845,6 @@
 		reg = <0x10e000 0x1000>;
 		interrupts = <46 0>;
 		status = "disabled";
-		clk-divider = <1>;
-		clk-source = <0>;
 		voltage-ref= <0>;
 		calibration-average = <128>;
 		power-level = <1>;

dts/arm/nxp/nxp_rt118x.dtsi

@@ -328,8 +328,6 @@
 		reg = <0x2600000 0x304>;
 		interrupts = <93 0>;
 		status = "disabled";
-		clk-divider = <7>;
-		clk-source = <1>;
 		voltage-ref= <1>;
 		calibration-average = <128>;
 		no-power-level;

dts/arm/nxp/nxp_rt11xx.dtsi

@@ -981,8 +981,6 @@
 			reg = <0x40050000 0x304>;
 			interrupts = <88 0>;
 			status = "disabled";
-			clk-divider = <8>;
-			clk-source = <0>;
 			voltage-ref= <1>;
 			calibration-average = <128>;
 			power-level = <0>;

dts/arm/nxp/nxp_rt5xx_common.dtsi

@@ -574,8 +574,6 @@
 		reg = <0x13a000 0x304>;
 		interrupts = <22 0>;
 		status = "disabled";
-		clk-divider = <1>;
-		clk-source = <0>;
 		voltage-ref= <1>;
 		calibration-average = <128>;
 		power-level = <0>;

dts/bindings/adc/nxp,lpc-lpadc.yaml

@@ -16,12 +16,10 @@ properties:
 
   clk-divider:
     type: int
-    required: true
     description: clock divider for the converter
 
   clk-source:
     type: int
-    required: true
     description: source to attach the ADC clock to
 
   voltage-ref: