dt-bindings: iio: use lowercase hex in examples

Use lowercase hex in addresses in examples.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230124081037.31013-4-krzysztof.kozlowski@linaro.orgSigned-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/accel/kionix,kxcjk1013.yaml

@@ -44,7 +44,7 @@ examples:
 
         accel@f {
             compatible = "kionix,kxtf9";
-            reg = <0x0F>;
+            reg = <0xf>;
             mount-matrix = "0", "1", "0",
                            "1", "0", "0",
                            "0", "0", "1";

Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml

@@ -150,7 +150,7 @@ examples:
 
     adc@126c0000 {
         compatible = "samsung,exynos3250-adc";
-        reg = <0x126C0000 0x100>;
+        reg = <0x126c0000 0x100>;
         interrupts = <0 137 0>;
         #io-channel-cells = <1>;
 

Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml

@@ -46,7 +46,7 @@ examples:
 
         dac@4c {
             compatible = "ti,dac5571";
-            reg = <0x4C>;
+            reg = <0x4c>;
             vref-supply = <&vdd_supply>;
         };
     };

Documentation/devicetree/bindings/iio/potentiometer/adi,ad5272.yaml

@@ -44,7 +44,7 @@ examples:
 
         potentiometer@2f {
             compatible = "adi,ad5272-020";
-            reg = <0x2F>;
+            reg = <0x2f>;
             reset-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
         };
     };

Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml

@@ -519,9 +519,9 @@ examples:
                         reg = <12>;
                         adi,sensor-type = <26>; //Steinhart
                         adi,rsense-handle = <&rsense2>;
-                        adi,custom-steinhart = <0x00F371EC 0x12345678
-                                        0x2C0F8733 0x10018C66 0xA0FEACCD
-                                        0x90021D99>; //6 entries
+                        adi,custom-steinhart = <0x00f371ec 0x12345678
+                                        0x2c0f8733 0x10018c66 0xa0feaccd
+                                        0x90021d99>; //6 entries
                 };
 
                 thermocouple@20 {