arm64: dts: rockchip: mark eeprom as read-only for Radxa E52C

The eeprom on the Radxa E52C SBC contains manufacturer data
such as the mac address, so it should be marked as read-only.

Fixes: 9be4171 ("arm64: dts: rockchip: Add Radxa E52C")
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20250810100020.445053-2-amadeus@jmu.edu.cn
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: aiamadeus

arch/arm64/boot/dts/rockchip/rk3582-radxa-e52c.dts

@@ -250,6 +250,7 @@
 		compatible = "belling,bl24c16a", "atmel,24c16";
 		reg = <0x50>;
 		pagesize = <16>;
+		read-only;
 		vcc-supply = <&vcc_3v3_pmu>;
 	};
 };