[PATCH v3] dt-bindings: mailbox: fsl,mu: Add missing power-domains

[Krzysztof Kozlowski]

Add quite common property - power-domains - to fix dtbs_check warnings
like:

  arch/arm64/boot/dts/freescale/imx8qxp-mek.dt.yaml:
    mailbox@5d280000: 'power-domains' does not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>

---

Changes since v2:
1. Set maxItems to power domains to 1

Changes since v1:
1. Add missing properties instead of unevaluatedProperties
---
 Documentation/devicetree/bindings/mailbox/fsl,mu.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
index 7ed096360be2..15cef82cd356 100644
--- a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
+++ b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
@@ -72,6 +72,9 @@ properties:
     description: boolean, if present, means it is for side B MU.
     type: boolean
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
-- 
2.17.1