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/board/siemens/draco/Kconfig b/board/siemens/draco/Kconfig
index d138ece..67fa320 100644
--- a/board/siemens/draco/Kconfig
+++ b/board/siemens/draco/Kconfig
@@ -29,3 +29,19 @@
 	default "dxr2"
 
 endif
+
+if TARGET_RASTABAN
+
+config SYS_BOARD
+	default "draco"
+
+config SYS_VENDOR
+	default "siemens"
+
+config SYS_SOC
+	default "am33xx"
+
+config SYS_CONFIG_NAME
+	default "rastaban"
+
+endif