ath79: remove ar934x MDIO reset from MAC node

Remove the MDIO reset from the MAC mode for the AR934x SoC family.
The reset is currently also defined for the MDIO node, where the reset
is acquired exclusively.

In case the ethernet node is enabled, this triggers a warning, as the
reset is already acquired by the MAC.

Signed-off-by: David Bauer <[email protected]>

target/linux/ath79/dts/ar934x.dtsi

@@ -272,8 +272,8 @@
 &eth1 {
 	compatible = "qca,ar9340-eth", "syscon";
 
-	resets = <&rst 13>, <&rst 23>;
-	reset-names = "mac", "mdio";
+	resets = <&rst 13>;
+	reset-names = "mac";
 	clocks = <&pll ATH79_CLK_AHB>, <&pll ATH79_CLK_AHB>;
 	clock-names = "eth", "mdio";
 	phy-mode = "gmii";