snow: Expand U-Boot size

Now that we have EFI, etc. enabled, U-Boot is larger than it was. Expand
the region allocated for it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/exynos5250-snow.dts b/arch/arm/dts/exynos5250-snow.dts
index 29c13c1..e99f6e7 100644
--- a/arch/arm/dts/exynos5250-snow.dts
+++ b/arch/arm/dts/exynos5250-snow.dts
@@ -88,7 +88,7 @@
 
 		ro-boot {
 			label = "u-boot";
-			reg = <0x6000 0x9a000>;
+			reg = <0x6000 0xb0000>;
 			read-only;
 			type = "blob boot,dtb";
 			required;