dt-bindings:iio:adc:ti,twl4030-madc yaml conversion

Conversion from txt to yaml as part of a general move of IIO bindings
to the new format.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Link: https://lore.kernel.org/r/20200909175946.395313-3-jic23@kernel.org

Documentation/devicetree/bindings/iio/adc/ti,twl4030-madc.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,twl4030-madc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MADC subsystem in the TWL4030 power module
+
+maintainers:
+  - Sebastian Reichel <sre@kernel.org>
+
+description:
+  The MADC subsystem in the TWL4030 consists of a 10-bit ADC
+  combined with a 16-input analog multiplexer.
+
+properties:
+  compatible:
+    const: ti,twl4030-madc
+
+  interrupts:
+    maxItems: 1
+
+  ti,system-uses-second-madc-irq:
+    type: boolean
+    description:
+      Set if the second madc irq register should be used, which is intended
+      to be used  by Co-Processors (e.g. a modem).
+
+  "#io-channel-cells":
+    const: 1
+
+required:
+  - compatible
+  - interrupts
+  - "#io-channel-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    twl {
+        madc {
+            compatible = "ti,twl4030-madc";
+            interrupts = <3>;
+            #io-channel-cells = <1>;
+        };
+    };
+...

Documentation/devicetree/bindings/iio/adc/twl4030-madc.txt

-* TWL4030 Monitoring Analog to Digital Converter (MADC)
-
-The MADC subsystem in the TWL4030 consists of a 10-bit ADC
-combined with a 16-input analog multiplexer.
-
-Required properties:
-  - compatible: Should contain "ti,twl4030-madc".
-  - interrupts: IRQ line for the MADC submodule.
-  - #io-channel-cells: Should be set to <1>.
-
-Optional properties:
-  - ti,system-uses-second-madc-irq: boolean, set if the second madc irq register
-				    should be used, which is intended to be used
-				    by Co-Processors (e.g. a modem).
-
-Example:
-
-&twl {
-	madc {
-		compatible = "ti,twl4030-madc";
-		interrupts = <3>;
-		#io-channel-cells = <1>;
-	};
-};