sunxi: binman: Do not hardcode U-Boot load address

The FIT description has access to the configuration variables. Use the
appropriate variable instead of hardcoding the address.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/dts/sunxi-u-boot.dtsi b/arch/arm/dts/sunxi-u-boot.dtsi
index f822588..a4227a3 100644
--- a/arch/arm/dts/sunxi-u-boot.dtsi
+++ b/arch/arm/dts/sunxi-u-boot.dtsi
@@ -42,7 +42,7 @@
 					os = "u-boot";
 					arch = "arm64";
 					compression = "none";
-					load = <0x4a000000>;
+					load = <CONFIG_SYS_TEXT_BASE>;
 
 					u-boot-nodtb {
 					};