ARM: dts: Fix the DNS-313 flash compatible

The flash on the DNS-313 needs to be probed as JEDEC, it does
not conform to the common CFI standard.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/gemini-dlink-dns-313.dts

@@ -157,8 +157,12 @@
 
 	soc {
 		flash@30000000 {
+			/*
+			 * This is a Eon EN29LV400AB 512 KiB flash with
+			 * three partitions.
+			 */
+			compatible = "cortina,gemini-flash", "jedec-flash";
 			status = "okay";
-			/* 512KB of flash */
 			reg = <0x30000000 0x00080000>;
 
 			/*