dt-bindings: rtc: nxp,pcf85063: Convert to DT schema

Convert the NXP PCF85063 RTC binding to DT schema format.

Add 'interrupts' and 'wakeup-source' as this device has an interrupt
which was not documented, but is in use.
'clock-output-names' and '#clock-cells' are added as well, those were
probably missed when adding clkout support in commit 8c229ab
("rtc: pcf85063: Add pcf85063 clkout control to common clock framework")

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220725071919.25342-1-alexander.stein@ew.tq-group.com

Author: tq-steina

Documentation/devicetree/bindings/rtc/nxp,pcf85063.txt

@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/nxp,pcf85063.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCF85063 Real Time Clock
+
+maintainers:
+  - Alexander Stein <alexander.stein@ew.tq-group.com>
+
+properties:
+  compatible:
+    enum:
+      - microcrystal,rv8263
+      - nxp,pcf85063
+      - nxp,pcf85063a
+      - nxp,pcf85063tp
+      - nxp,pca85073a
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 0
+
+  clock-output-names:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  quartz-load-femtofarads:
+    description:
+      The capacitive load of the quartz(x-tal).
+    enum: [7000, 12500]
+    default: 7000
+
+  clock:
+    $ref: /schemas/clock/fixed-clock.yaml
+    description:
+      Provide this if the square wave pin is used as boot-enabled
+      fixed clock.
+
+  wakeup-source: true
+
+allOf:
+  - $ref: rtc.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - microcrystal,rv8263
+    then:
+      properties:
+        quartz-load-femtofarads: false
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nxp,pcf85063
+    then:
+      properties:
+        quartz-load-femtofarads:
+          const: 7000
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        rtc@51 {
+          compatible = "nxp,pcf85063a";
+          reg = <0x51>;
+          quartz-load-femtofarads = <12500>;
+
+          clock {
+            compatible = "fixed-clock";
+            #clock-cells = <0>;
+            clock-frequency = <32768>;
+          };
+        };
+      };