[PATCH] riscv: dts: sophgo: fix mdio node name for CV180X

[Inochi Amaoto]

As the mdio multipledxer is marked as mdio device, the check complains
the mdio bus number exceed the maximum.

Change the node name to mdio-mux to remove the following warnings:
mdio at 3009800 (mdio-mux-mmioreg): mdio at 80:reg:0:0: 128 is greater than
the maximum of 31

Fixes: b7945143bc33 ("riscv: dts: sophgo: Add mdio multiplexer device for cv18xx")
Signed-off-by: Inochi Amaoto <inochiama at gmail.com>
Reported-by: kernel test robot <lkp at intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202507140738.XRjv3G8i-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202507121830.POx2KDVi-lkp@intel.com/
---
 arch/riscv/boot/dts/sophgo/cv180x.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
index 5f094c6085cb..27056ef70ce4 100644
--- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
@@ -57,7 +57,7 @@ rst: reset-controller at 3003000 {
 			#reset-cells = <1>;
 		};

-		mdio: mdio at 3009800 {
+		mdio: mdio-mux at 3009800 {
 			compatible = "mdio-mux-mmioreg", "mdio-mux";
 			reg = <0x3009800 0x4>;
 			#address-cells = <1>;
--
2.50.1