arm64: dts: renesas: s4sk: Add aliases for I2C buses

They are numbered like this in the schematics, so keep the names in
Linux the same.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240523205041.7356-4-wsa+renesas@sang-engineering.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a779f4-s4sk.dts

@@ -14,6 +14,12 @@ / {
 	compatible = "renesas,s4sk", "renesas,r8a779f4", "renesas,r8a779f0";
 
 	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
+		i2c4 = &i2c4;
+		i2c5 = &i2c5;
 		serial0 = &hscif0;
 		serial1 = &hscif1;
 		ethernet0 = &rswitch;