dt-bindings: interrupt-controller: Convert ti,omap-intc-irq to DT schema

Convert the TI OMAP2/3 interrupt controller binding to schema format.
It's a straight-forward conversion of the typical interrupt controller.

"ti,intc-size" property isn't actually used with "ti,omap2-intc", so the
2 bindings can be combined.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring (Arm) <[e-mail]>

Documentation/devicetree/bindings/interrupt-controller/ti,omap-intc-irq.txt

···
-Omap2/3 intc controller
-
-On TI omap2 and 3 the intc interrupt controller can provide
-96 or 128 IRQ signals to the ARM host depending on the SoC.
-
-Required Properties:
-- compatible: should be one of
-			"ti,omap2-intc"
-			"ti,omap3-intc"
-			"ti,dm814-intc"
-			"ti,dm816-intc"
-			"ti,am33xx-intc"
-
-- interrupt-controller : Identifies the node as an interrupt controller
-- #interrupt-cells : Specifies the number of cells needed to encode interrupt
-		     source, should be 1 for intc
-- interrupts: interrupt reference to primary interrupt controller
-
-Please refer to interrupts.txt in this directory for details of the common
-Interrupt Controllers bindings used by client devices.
-
-Example:
-	intc: interrupt-controller@48200000 {
-		compatible = "ti,omap3-intc";
-		interrupt-controller;
-		#interrupt-cells = <1>;
-		reg = <0x48200000 0x1000>;
-	};

Documentation/devicetree/bindings/interrupt-controller/ti,omap-intc-irq.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/ti,omap-intc-irq.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI OMAP Interrupt Controller
+
+maintainers:
+  - Tony Lindgren <[e-mail]>
+
+description:
+  On TI omap2 and 3 the intc interrupt controller can provide 96 or 128 IRQ
+  signals to the ARM host depending on the SoC.
+
+properties:
+  compatible:
+    enum:
+      - ti,omap2-intc
+      - ti,omap3-intc
+      - ti,dm814-intc
+      - ti,dm816-intc
+      - ti,am33xx-intc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-controller@48200000 {
+        compatible = "ti,omap3-intc";
+        reg = <0x48200000 0x1000>;
+        interrupts = <32>;
+        interrupt-controller;
+        #interrupt-cells = <1>;
+    };

Documentation/devicetree/bindings/interrupt-controller/ti,omap2-intc.txt

···
-* OMAP Interrupt Controller
-
-OMAP2/3 are using a TI interrupt controller that can support several
-configurable number of interrupts.
-
-Main node required properties:
-
-- compatible : should be:
-	"ti,omap2-intc"
-- interrupt-controller : Identifies the node as an interrupt controller
-- #interrupt-cells : Specifies the number of cells needed to encode an
-  interrupt source. The type shall be a <u32> and the value shall be 1.
-
-  The cell contains the interrupt number in the range [0-128].
-- ti,intc-size: Number of interrupts handled by the interrupt controller.
-- reg: physical base address and size of the intc registers map.
-
-Example:
-
-	intc: interrupt-controller@1 {
-		compatible = "ti,omap2-intc";
-		interrupt-controller;
-		#interrupt-cells = <1>;
-		ti,intc-size = <96>;
-		reg = <0x48200000 0x1000>;
-	};
-