arm: socfpga: av_socdk: Add support for QSPI boot

Add missing DT nodes to allow booting from QSPI NOR.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Chin Liang See <clsee@altera.com>
Cc: Denis Bakhvalov <denis.bakhvalov@nokia.com>

arch/arm/dts/socfpga_arria5_socdk.dts

@@ -82,8 +82,10 @@
 
 &qspi {
 	status = "okay";
+	u-boot,dm-pre-reloc;
 
 	flash0: n25q00@0 {
+		u-boot,dm-pre-reloc;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "n25q00";