dt-bindings: uniphier-system-bus: Use 'serial' as node name

Use 'serial' as node name to fix the following warning seen with 'make dt_binding_check':

Documentation/devicetree/bindings/bus/socionext,uniphier-system-bus.example.dt.yaml: uart@5,00200000: $nodename:0: 'uart@5,00200000' does not match '^serial(@[0-9a-f,]+)*$'

---
 .../devicetree/bindings/bus/socionext,uniphier-system-bus.yaml  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index c4c9119e4a20..9fa4f891fa00 100644
@@ -87,7 +87,7 @@ examples:
             phy-mode = "mii";
         };
 
-        uart@5,00200000 {
+        serial@5,00200000 {
             compatible = "ns16550a";
             reg = <5 0x00200000 0x20>;
             interrupts = <0 49 4>;

2.17.1

Already applied a fix for this.