ARM: dts: rockchip: Add ethernet rgmiim1 pin-control for rv1126

Add ethernet pin-control for rv1126 SoC.

Co-Developed-by: Jagan Teki <jagan@edgeble.ai>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Signed-off-by: Anand Moon <anand@edgeble.ai>
Link: https://lore.kernel.org/r/20230111172437.5295-2-anand@edgeble.ai


Signed-off-by: Heiko Stuebner <heiko@sntech.de>