arm64: dts: amlogic: Use hyphen in node names

DTS coding style prefers hyphens instead of underscores in the node
names.  Change should be safe, because node names are not considered an
ABI.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://patch.msgid.link/20251223152510.155463-3-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

Author: krzk

arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi

@@ -780,7 +780,7 @@
 					#address-cells = <1>;
 					#size-cells = <0>;
 
-					internal_ephy: ethernet_phy@8 {
+					internal_ephy: ethernet-phy@8 {
 						compatible = "ethernet-phy-id0180.3301",
 							     "ethernet-phy-ieee802.3-c22";
 						interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;