dt-bindings: gpio: mpc8xxx: Convert to yaml format

Convert binding doc from txt to yaml.

Remove redundated "gpio1: gpio@2300000" example.
Add gpio-controller at example "gpio@1100".
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240531164357.1419858-1-Frank.Li@nxp.comSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/devicetree/bindings/gpio/fsl,qoriq-gpio.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/fsl,qoriq-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MPC512x/MPC8xxx/QorIQ/Layerscape GPIO controller
+
+maintainers:
+  - Frank Li <Frank.Li@nxp.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,mpc5121-gpio
+          - fsl,mpc5125-gpio
+          - fsl,mpc8349-gpio
+          - fsl,mpc8572-gpio
+          - fsl,mpc8610-gpio
+          - fsl,pq3-gpio
+      - items:
+          - enum:
+              - fsl,ls1021a-gpio
+              - fsl,ls1028a-gpio
+              - fsl,ls1043a-gpio
+              - fsl,ls1088a-gpio
+              - fsl,ls2080a-gpio
+          - const: fsl,qoriq-gpio
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#gpio-cells":
+    const: 2
+
+  gpio-controller: true
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 2
+
+  little-endian:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      GPIO registers are used as little endian. If not
+      present registers are used as big endian by default.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    gpio@1100 {
+        compatible = "fsl,mpc5125-gpio";
+        reg = <0x1100 0x080>;
+        interrupts = <78 0x8>;
+        gpio-controller;
+        #gpio-cells = <2>;
+    };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    gpio@2300000 {
+        compatible = "fsl,ls2080a-gpio", "fsl,qoriq-gpio";
+        reg = <0x2300000 0x10000>;
+        interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
+        little-endian;
+        gpio-controller;
+        #gpio-cells = <2>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+    };

Documentation/devicetree/bindings/gpio/gpio-mpc8xxx.txt

-* Freescale MPC512x/MPC8xxx/QorIQ/Layerscape GPIO controller
-
-Required properties:
-- compatible : Should be "fsl,<soc>-gpio"
-  The following <soc>s are known to be supported:
-	mpc5121, mpc5125, mpc8349, mpc8572, mpc8610, pq3, qoriq,
-	ls1021a, ls1043a, ls2080a, ls1028a, ls1088a.
-- reg : Address and length of the register set for the device
-- interrupts : Should be the port interrupt shared by all 32 pins.
-- #gpio-cells : Should be two.  The first cell is the pin number and
-  the second cell is used to specify the gpio polarity:
-      0 = active high
-      1 = active low
-
-Optional properties:
-- little-endian : GPIO registers are used as little endian. If not
-                  present registers are used as big endian by default.
-
-Example of gpio-controller node for a mpc5125 SoC:
-
-gpio0: gpio@1100 {
-	compatible = "fsl,mpc5125-gpio";
-	#gpio-cells = <2>;
-	reg = <0x1100 0x080>;
-	interrupts = <78 0x8>;
-};
-
-Example of gpio-controller node for a ls2080a SoC:
-
-gpio0: gpio@2300000 {
-	compatible = "fsl,ls2080a-gpio", "fsl,qoriq-gpio";
-	reg = <0x0 0x2300000 0x0 0x10000>;
-	interrupts = <0 36 0x4>; /* Level high type */
-	gpio-controller;
-	little-endian;
-	#gpio-cells = <2>;
-	interrupt-controller;
-	#interrupt-cells = <2>;
-};
-
-
-Example of gpio-controller node for a ls1028a/ls1088a SoC:
-
-gpio1: gpio@2300000 {
-	compatible = "fsl,ls1028a-gpio", "fsl,ls1088a-gpio", "fsl,qoriq-gpio";
-	reg = <0x0 0x2300000 0x0 0x10000>;
-	interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
-	gpio-controller;
-	#gpio-cells = <2>;
-	interrupt-controller;
-	#interrupt-cells = <2>;
-	little-endian;
-};