dt-bindings: timer: Convert marvell,orion-timer to DT schema

Convert the Marvell Orion Timer binding to DT schema format. It's a
straight-forward conversion.

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

Documentation/devicetree/bindings/timer/marvell,orion-timer.txt

···
-Marvell Orion SoC timer
-
-Required properties:
-- compatible: shall be "marvell,orion-timer"
-- reg: base address of the timer register starting with TIMERS CONTROL register
-- interrupts: should contain the interrupts for Timer0 and Timer1
-- clocks: phandle of timer reference clock (tclk)
-
-Example:
-	timer: timer {
-		compatible = "marvell,orion-timer";
-		reg = <0x20300 0x20>;
-		interrupt-parent = <&bridge_intc>;
-		interrupts = <1>, <2>;
-		clocks = <&core_clk 0>;
-	};

Documentation/devicetree/bindings/timer/marvell,orion-timer.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/marvell,orion-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell Orion SoC timer
+
+maintainers:
+  - Andrew Lunn <[e-mail]>
+  - Gregory Clement <[e-mail]>
+
+properties:
+  compatible:
+    const: marvell,orion-timer
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: Timer0 interrupt
+      - description: Timer1 interrupt
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    timer@20300 {
+        compatible = "marvell,orion-timer";
+        reg = <0x20300 0x20>;
+        interrupts = <1>, <2>;
+        clocks = <&core_clk 0>;
+    };