dt-bindings: Add ROHM BM1390 pressure sensor

BM1390GLV-Z is a pressure sensor which performs internal temperature
compensation for the MEMS. Pressure range is from 300 hPa to 1300 hPa
and sample averaging and IIR filtering is built in sensor. Temperature
measurement is also supported.

Add dt-bindings for the sensor.
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/08796e6b28d2c67933b1a1a5eca0f43da322a597.1695727471.git.mazziesaccount@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/pressure/rohm,bm1390.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/pressure/rohm,bm1390.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BM1390 pressure sensor
+
+maintainers:
+  - Matti Vaittinen <mazziesaccount@gmail.com>
+
+description:
+  BM1390GLV-Z is a pressure sensor which performs internal temperature
+  compensation for the MEMS. Pressure range is from 300 hPa to 1300 hPa
+  and sample averaging and IIR filtering is built in. Temperature
+  measurement is also supported.
+
+properties:
+  compatible:
+    const: rohm,bm1390glv-z
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pressure-sensor@5d {
+            compatible = "rohm,bm1390glv-z";
+            reg = <0x5d>;
+
+            interrupt-parent = <&gpio1>;
+            interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
+
+            vdd-supply = <&vdd>;
+        };
+    };