arm64: dts: rockchip: add rk3588 i2c aliases to soc dtsi

The i2c controllers on rk3588 are named i2c0 - i2c8. Board schematics
also use these exact numbers and we want those names to also reflect
in the OS devices because everything else would just cause confusion.
Userspace i2c access is a thing afterall.

To prevent each board repeating their list of i2c aliases, define them
in the soc dtsi, as all previous Rockchip soc do already.
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/20231205164842.556684-3-heiko@sntech.de

arch/arm64/boot/dts/rockchip/rk3588s.dtsi

@@ -19,6 +19,15 @@ / {
 	#size-cells = <2>;
 
 	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
+		i2c4 = &i2c4;
+		i2c5 = &i2c5;
+		i2c6 = &i2c6;
+		i2c7 = &i2c7;
+		i2c8 = &i2c8;
 		serial0 = &uart0;
 		serial1 = &uart1;
 		serial2 = &uart2;