x86: dts: switch spi-flash to jedec, spi-nor compatible

The x86 code and DT uses "spi-flash" to detect a flash node, switch to
"jedec,spi-nor" in the DTS files and in fdtdec by switching the
GENERIC_SPI_FLASH value to to jedec,spi-nor.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/arch/x86/dts/cougarcanyon2.dts b/arch/x86/dts/cougarcanyon2.dts
index 9801790..c6ba811 100644
--- a/arch/x86/dts/cougarcanyon2.dts
+++ b/arch/x86/dts/cougarcanyon2.dts
@@ -154,7 +154,7 @@
 
 				spi-flash@0 {
 					reg = <0>;
-					compatible = "winbond,w25q64bv", "spi-flash";
+					compatible = "winbond,w25q64bv", "jedec,spi-nor";
 					memory-map = <0xff800000 0x00800000>;
 				};
 			};