ARM: dts: imx7-tqma7: mark system data eeprom as read-only

This is manufacturer data and shall not be modified.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/nxp/imx/imx7-tqma7.dtsi

@@ -146,6 +146,7 @@ se97b: temperature-sensor-eeprom@1e {
 	/* ST M24C64 */
 	m24c64: eeprom@50 {
 		compatible = "atmel,24c64";
+		read-only;
 		reg = <0x50>;
 		pagesize = <32>;
 		status = "okay";