ramips: mt7621-dts: do not modify ethernet node for MeiG SLT866

Currently, the pinctrl-0 property on the ethernet node is modified to
exclude the rgmii1 and rgmii2 pin groups to be claimed with rgmii1 and
rgmii2 functions, respectively. Remove the modification of this property as
we need these pin groups to be claimed with the said functions for this
device.

Signed-off-by: Arınç ÜNAL <[email protected]>

target/linux/ramips/dts/mt7621_meig_slt866.dts

@@ -185,11 +185,6 @@
 	};
 };
 
-&ethernet {
-	pinctrl-names = "default";
-	pinctrl-0 = <&mdio_pins>;
-};
-
 &gmac0 {
 	nvmem-cells = <&macaddr_custom_40 0>;
 	nvmem-cell-names = "mac-address";