kernel: configure Mars-CM's EEPROM as 24c02

if configured as 24c04, its address will occupy 0x51,
conflicting with the RTC chip pcf85063 on the IO-Board.
Refer to:
Documentation/misc-devices/eeprom.rst

linux/arch/riscv/boot/dts/starfive/jh7110-milkv-mars-cm.dtsi

@@ -449,7 +449,7 @@
 	status = "okay";
 
 	eeprom@50 {
-		compatible = "atmel,24c04";
+		compatible = "atmel,24c02";
 		reg = <0x50>;
 		pagesize = <16>;
 	};