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

There is no reason not to use the Linux "jedec,spi-nor" binding in U-Boot
dts files. This compatible has been added in sf_probe, let use it.

This patch switches to jedec,spi-nor when spi-flash is used in the DTS
and DTSI files, and removed spi-flash when jedec,spi-nor is already
present.

The x86 dts are switched in a separate commit since it depends on a change
in fdtdec.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Evgeniy Paltsev <paltsev@synopsys.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Patrick Delaunay <Patrick.delaunay@st.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/arch/arm/dts/fsl-ls1012a-frdm.dtsi b/arch/arm/dts/fsl-ls1012a-frdm.dtsi
index 9cb3de1..a357793 100644
--- a/arch/arm/dts/fsl-ls1012a-frdm.dtsi
+++ b/arch/arm/dts/fsl-ls1012a-frdm.dtsi
@@ -21,7 +21,7 @@
 	qflash0: s25fl128s@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		compatible = "spi-flash";
+		compatible = "jedec,spi-nor";
 		spi-max-frequency = <20000000>;
 		reg = <0>;
 	};