dt-bindings: rtc: cpcap: convert to schema

Convert RTC devicetree bindings for the Motorola CPCAP MFD from TXT to
YAML format. This patch does not change any functionality; the bindings
remain the same.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Link: https://patch.msgid.link/20260125134302.45958-7-clamor95@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: clamor-s

Documentation/devicetree/bindings/rtc/cpcap-rtc.txt

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/motorola,cpcap-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Motorola CPCAP PMIC RTC
+
+maintainers:
+  - Svyatoslav Ryhel <clamor95@gmail.com>
+
+description:
+  This module is part of the Motorola CPCAP MFD device. For more details
+  see Documentation/devicetree/bindings/mfd/motorola,cpcap.yaml. The
+  RTC is represented as a sub-node of the PMIC node on the device tree.
+
+properties:
+  compatible:
+    const: motorola,cpcap-rtc
+
+  interrupts:
+    items:
+      - description: alarm interrupt
+      - description: 1 Hz interrupt
+
+required:
+  - compatible
+  - interrupts
+
+additionalProperties: false
+
+...