armv8/ls2085aqds: NAND boot support

This adds NAND boot support for LS2085AQDS, using SPL framework.
Details of forming NAND image can be found in README.

Signed-off-by: Scott Wood <scottwood@freescale.com>
[York Sun: Remove +S from defconfig after commit 252ed872]
Signed-off-by: York Sun <yorksun@freescale.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3d0828d..4b7761d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -715,6 +715,7 @@
 	bool "Support ls2085aqds"
 	select ARM64
 	select ARMV8_MULTIENTRY
+	select SUPPORT_SPL
 	help
 	  Support for Freescale LS2085AQDS platform
 	  The LS2085A Development System (QDS) is a high-performance