siemens,am33x,rastaban: add rastaban config

rastaban is a draco version with more flash, more RAM
and faster CPU. Number of partitions is the same but
rootfs partition is different.

Signed-off-by: Samuel Egli <samuel.egli@siemens.com>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ac86518..13f579a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -351,6 +351,11 @@
 	select CPU_V7
 	select SUPPORT_SPL
 
+config TARGET_RASTABAN
+	bool "Support rastaban"
+	select CPU_V7
+	select SUPPORT_SPL
+
 config TARGET_PXM2
 	bool "Support pxm2"
 	select CPU_V7