dt-bindings: rtc: sprd,sc2731-rtc: convert to YAML

Convert the Spreadtrum SC2731 RTC bindings to DT schema.
Rename file to match compatible.

Signed-off-by: Stanislav Jakubek <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/ZolsyEC8eeJWNIb6@standask-GA-A55M-S2HP
Signed-off-by: Alexandre Belloni <[email protected]>

Author: Stanislav Jakubek

Documentation/devicetree/bindings/rtc/sprd,sc2731-rtc.yaml

@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/sprd,sc2731-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spreadtrum SC2731 Real Time Clock
+
+maintainers:
+  - Orson Zhai <[email protected]>
+  - Baolin Wang <[email protected]>
+  - Chunyan Zhang <[email protected]>
+
+properties:
+  compatible:
+    const: sprd,sc2731-rtc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: rtc.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    pmic {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      rtc@280 {
+        compatible = "sprd,sc2731-rtc";
+        reg = <0x280>;
+        interrupt-parent = <&sc2731_pmic>;
+        interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+      };
+    };
+...