ARM: dts: genmai: Correct primary compatible value for eeprom

The Renesas part number of the two-wire serial interface EEPROM is not
24C128, but R1EX24128ASA00A.

Hence change its primary compatible value to "renesas,r1ex24128".
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r7s72100-genmai.dts

@@ -123,7 +123,7 @@ &i2c2 {
 	pinctrl-0 = <&i2c2_pins>;
 
 	eeprom@50 {
-		compatible = "renesas,24c128", "atmel,24c128";
+		compatible = "renesas,r1ex24128", "atmel,24c128";
 		reg = <0x50>;
 		pagesize = <64>;
 	};