ath79: correct OCEDO Ursus phy-mode property

This fixes the previously incorrect phy-mode for the OCEDO Ursus GMAC0.

See 62abbd587d ("ath79: correct various phy-mode properties")
for more details.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ath79/dts/qca9558_ocedo_ursus.dts

@@ -125,8 +125,10 @@
 &eth0 {
 	status = "okay";
 	mtd-mac-address = <&art 0x00>;
+
+	phy-mode = "rgmii-rxid";
 	phy-handle = <&phy1>;
-	pll-data = <0xa6000000 0x80000101 0x80001313>;
+	pll-data = <0x8e000000 0x80000101 0x80001313>;
 
 	gmac_config: gmac-config {
 		device = <&gmac>;