dt-bindings: iio: Correct indentation and style in DTS example

DTS example in the bindings should be indented with 2- or 4-spaces and
aligned with opening '- |', so correct any differences like 3-spaces or
mixtures 2- and 4-spaces in one binding.

No functional changes here, but saves some comments during reviews of
new patches built on existing code.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Nuno Sa <[e-mail]>
Acked-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

Documentation/devicetree/bindings/iio/dac/adi,ad5380.yaml

···
         #address-cells = <1>;
         #size-cells = <0>;
         dac@0 {
-           reg = <0>;
-           compatible = "adi,ad5390-5";
-           vref-supply = <&dacvref>;
+            reg = <0>;
+            compatible = "adi,ad5390-5";
+            vref-supply = <&dacvref>;
         };
     };
   - |
     i2c {
-       #address-cells = <1>;
-       #size-cells = <0>;
-       dac@42 {
-          reg = <0x42>;
-          compatible = "adi,ad5380-3";
-       };
+        #address-cells = <1>;
+        #size-cells = <0>;
+        dac@42 {
+            reg = <0x42>;
+            compatible = "adi,ad5380-3";
+        };
     };
 ...

Documentation/devicetree/bindings/iio/humidity/sciosense,ens210.yaml

···
 examples:
   - |
     i2c {
-       #address-cells = <1>;
-       #size-cells = <0>;
+        #address-cells = <1>;
+        #size-cells = <0>;
 
-       temperature-sensor@43 {
-           compatible = "sciosense,ens210";
-           reg = <0x43>;
-       };
+        temperature-sensor@43 {
+            compatible = "sciosense,ens210";
+            reg = <0x43>;
+        };
     };
 ...
 

Documentation/devicetree/bindings/iio/temperature/maxim,max31865.yaml

···
 examples:
   - |
     spi {
-       #address-cells = <1>;
-       #size-cells = <0>;
+        #address-cells = <1>;
+        #size-cells = <0>;
 
-       temperature-sensor@0 {
-           compatible = "maxim,max31865";
-           reg = <0>;
-           spi-max-frequency = <400000>;
-           spi-cpha;
-           maxim,3-wire;
-       };
+        temperature-sensor@0 {
+            compatible = "maxim,max31865";
+            reg = <0>;
+            spi-max-frequency = <400000>;
+            spi-cpha;
+            maxim,3-wire;
+        };
     };
 ...

Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml

···
         #size-cells = <0>;
 
         tmp117@48 {
-             compatible = "ti,tmp117";
-             reg = <0x48>;
-             vcc-supply = <&pmic_reg_3v3>;
+            compatible = "ti,tmp117";
+            reg = <0x48>;
+            vcc-supply = <&pmic_reg_3v3>;
         };
     };