dt-bindings:iio:pressure:meas,ms5611 yaml conversion.

One addition here was to put in a 20MHz maximum for the SPI bus
as specified in the datasheets of both support parts.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Tomasz Duszynski <tduszyns@gmail.com>
Link: https://lore.kernel.org/r/20201031134110.724233-8-jic23@kernel.org

Documentation/devicetree/bindings/iio/pressure/meas,ms5611.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/pressure/meas,ms5611.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Measurement Specialities ms5611 and similar pressure sensors
+
+maintainers:
+  - Tomasz Duszynski <tduszyns@gmail.com>
+
+description: |
+  Pressure sensors from MEAS Switzerland with SPI and I2C bus interfaces.
+
+properties:
+  compatible:
+    enum:
+      - meas,ms5607
+      - meas,ms5611
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+  spi-max-frequency:
+    maximum: 20000000
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pressure@77 {
+            compatible = "meas,ms5607";
+            reg = <0x77>;
+            vdd-supply = <&ldo_3v3_gnss>;
+        };
+    };
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pressure@0 {
+            compatible = "meas,ms5611";
+            reg = <0>;
+            vdd-supply = <&ldo_3v3_gnss>;
+        };
+    };
+...

Documentation/devicetree/bindings/iio/pressure/ms5611.txt

-MEAS ms5611 family pressure sensors
-
-Pressure sensors from MEAS Switzerland with SPI and I2C bus interfaces.
-
-Required properties:
-- compatible: "meas,ms5611" or "meas,ms5607"
-- reg: the I2C address or SPI chip select the device will respond to
-
-Optional properties:
-- vdd-supply: an optional regulator that needs to be on to provide VDD
-  power to the sensor.
-
-Example:
-
-ms5607@77 {
-	compatible = "meas,ms5607";
-	reg = <0x77>;
-	vdd-supply = <&ldo_3v3_gnss>;
-};