dt-bindings: mfd: qcom-pm8xxx: Add missing child nodes

Add gpio, keypad, led, mpps, pwrkey, vibrator and xoadc as possible
child nodes of qcom,pm8xxx, referencing existint schema files.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230827132525.951475-3-dmitry.baryshkov@linaro.orgSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/mfd/qcom-pm8xxx.yaml

@@ -43,13 +43,37 @@ properties:
   interrupt-controller: true
 
 patternProperties:
+  "gpio@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/pinctrl/qcom,pmic-gpio.yaml#
+
+  "keypad@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/input/qcom,pm8921-keypad.yaml#
+
   "led@[0-9a-f]+$":
     type: object
     $ref: /schemas/leds/qcom,pm8058-led.yaml#
 
+  "mpps@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/pinctrl/qcom,pmic-mpp.yaml#
+
+  "pwrkey@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/input/qcom,pm8921-pwrkey.yaml#
+
   "rtc@[0-9a-f]+$":
     type: object
-    $ref: ../rtc/qcom-pm8xxx-rtc.yaml
+    $ref: /schemas/rtc/qcom-pm8xxx-rtc.yaml#
+
+  "vibrator@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/input/qcom,pm8xxx-vib.yaml#
+
+  "xoadc@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/iio/adc/qcom,pm8018-adc.yaml#
 
 required:
   - compatible