arm64: dts: rockchip: specify pinctrl for i2c adapters on rock-3a

On the Radxa ROCK3 Model A the I2C adapters related to the MIPI DSI
connector and the M.2/NGFF connector use the non-default pins.
Specify the correct pinctrl but leave the adapters disabled (as
they are supposed to be activated by overlays that describe the
external hardware).
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220712133204.2524942-3-michael.riesch@wolfvision.netSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts

@@ -472,6 +472,18 @@ codec {
 	};
 };
 
+&i2c3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c3m1_xfer>;
+	status = "disabled";
+};
+
+&i2c4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c4m1_xfer>;
+	status = "disabled";
+};
+
 &i2s0_8ch {
 	status = "okay";
 };