dt-bindings: gpio: Convert TI TPIC2810 GPIO Controller bindings to YAML

Convert gpio-tpic2810 bindings to yaml format and remove outdated
bindings in .txt format.
Signed-off-by: Aparna M <a-m1@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

Documentation/devicetree/bindings/gpio/gpio-tpic2810.txt

-TPIC2810 GPIO controller bindings
-
-Required properties:
- - compatible		: Should be "ti,tpic2810".
- - reg			: The I2C address of the device
- - gpio-controller	: Marks the device node as a GPIO controller.
- - #gpio-cells		: Should be two. For consumer use see gpio.txt.
-
-Example:
-
-	gpio@60 {
-		compatible = "ti,tpic2810";
-		reg = <0x60>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};

Documentation/devicetree/bindings/gpio/gpio-tpic2810.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-tpic2810.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TPIC2810 GPIO controller bindings
+
+maintainers:
+  - Aswath Govindraju <a-govindraju@ti.com>
+
+properties:
+  compatible:
+    enum:
+      - ti,tpic2810
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+  gpio-line-names:
+    minItems: 1
+    maxItems: 32
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        gpio@60 {
+            compatible = "ti,tpic2810";
+            reg = <0x60>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            gpio-line-names = "LED A", "LED B", "LED C";
+        };
+    };