dt-bindings: serial: Add a new compatible string for ums9632

The UMS9632 uses the SC9632 serial device.

Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
Link: https://lore.kernel.org/r/20241113110516.2166328-3-Wenhua.Lin@unisoc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Wenhua Lin

Documentation/devicetree/bindings/serial/sprd-uart.yaml

@@ -17,6 +17,7 @@ properties:
     oneOf:
       - items:
           - enum:
+              - sprd,sc9632-uart
               - sprd,sc9860-uart
               - sprd,sc9863a-uart
               - sprd,ums512-uart