arm: SC594-SOM-EZLITE initial support

Adds support for Analog Devices' SC594-SOM-EZLITE board. Includes:
- Board specific configs in mach-sc5xx/Kconfig
- Board-specific Kconfig and environment in board/adi/

Signed-off-by: Oliver Gaskell <Oliver.Gaskell@analog.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index d46984b..e723ff1 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -1131,6 +1131,7 @@
 	default 0x88000000 if ARCH_OMAP2PLUS
 	default 0x99000000 if ARCH_SC5XX && SC59X_64
 	default 0xA0000000 if ARCH_SC5XX && TARGET_SC594_SOM_EZKIT
+	default 0x80000000 if ARCH_SC5XX && TARGET_SC594_SOM_EZLITE
 	help
 	  Address in memory where the 'args' file, typically a device tree
 	  will be loaded in to memory.