ARM: dts: stm32: Remove useless spi-nor compatible string

Compatible string "micron,n25q128a13" is useless, remove it.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/dts/stm32f746-disco-u-boot.dtsi b/arch/arm/dts/stm32f746-disco-u-boot.dtsi
index bbe90fa..ade7285 100644
--- a/arch/arm/dts/stm32f746-disco-u-boot.dtsi
+++ b/arch/arm/dts/stm32f746-disco-u-boot.dtsi
@@ -238,7 +238,7 @@
 	qflash0: n25q128a {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		compatible = "micron,n25q128a13", "jedec,spi-nor";
+		compatible = "jedec,spi-nor";
 		spi-max-frequency = <108000000>;
 		spi-tx-bus-width = <4>;
 		spi-rx-bus-width = <4>;