armv8/ls2085ardb: Enable NAND SPL support

Enable NAND boot support using SPL framework. To boot from
NAND, either use DIP switches on board, or "qixis_reset nand"
command. 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 4b7761d..844b862 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -726,6 +726,7 @@
 	bool "Support ls2085ardb"
 	select ARM64
 	select ARMV8_MULTIENTRY
+	select SUPPORT_SPL
 	help
 	  Support for Freescale LS2085ARDB platform.
 	  The LS2085A Reference design board (RDB) is a high-performance