[PATCH 1/1] dt-bindings: serial: Add label property for pl011

[Zhen Lei <thunder.leizhen@xxxxxxxxxx>]

When there is more than one pl011 serial port present, the label property
allows a custom name to be used for briefly describe the usage or position
of each serial port.

Without this "label" property, many dtbs_check warnings similar to the
following are reported:
arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dt.yaml: \
serial@ffd74000: Additional properties are not allowed ('label' was unexpected)
        From schema: Documentation/devicetree/bindings/serial/pl011.yaml

Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/serial/pl011.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/pl011.yaml b/Documentation/devicetree/bindings/serial/pl011.yaml
index 1f8e9f2644b6b80..303c7746423f503 100644
--- a/Documentation/devicetree/bindings/serial/pl011.yaml
+++ b/Documentation/devicetree/bindings/serial/pl011.yaml
@@ -34,6 +34,9 @@ properties:
   reg:
     maxItems: 1
 
+  label:
+    maxItems: 1
+
   interrupts:
     maxItems: 1
 
-- 
2.26.0.106.g9fadedd