ARM: dts: stm32: Fix qspi memory map size for stm32f7 boards

stm32f746-disco embeds a 16Mb qspi flash, stm32f746-eval and
stm32f769-disco embeds a 64Mb qspi flash.
Update the reg property accordingly

Remove deprecated memory-map property.

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 bc337b1..a6799be 100644
--- a/arch/arm/dts/stm32f746-disco-u-boot.dtsi
+++ b/arch/arm/dts/stm32f746-disco-u-boot.dtsi
@@ -234,6 +234,7 @@
 };
 
 &qspi {
+	reg = <0xA0001000 0x1000>, <0x90000000 0x1000000>;
 	qflash0: n25q128a {
 		#address-cells = <1>;
 		#size-cells = <1>;
@@ -241,7 +242,6 @@
 		spi-max-frequency = <108000000>;
 		spi-tx-bus-width = <1>;
 		spi-rx-bus-width = <1>;
-		memory-map = <0x90000000 0x1000000>;
 		reg = <0>;
 	};
 };