siemens,am33x: add draco etamin board

In the draco CPU board family, etamin is a new variant
with bigger flash and more RAM. Due to new flash that
uses larger pages (4K) some changes are necessary because
it impacts the MTD partition layout and the ubi mount
parameters.

Signed-off-by: Samuel Egli <samuel.egli@siemens.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
[trini: Move BOOTDELAY into defconfig, just always be 3 now]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/siemens/draco/Kconfig b/board/siemens/draco/Kconfig
index 819d187..a699c7d 100644
--- a/board/siemens/draco/Kconfig
+++ b/board/siemens/draco/Kconfig
@@ -45,3 +45,19 @@
 	default "rastaban"
 
 endif
+
+if TARGET_ETAMIN
+
+config SYS_BOARD
+        default "draco"
+
+config SYS_VENDOR
+        default "siemens"
+
+config SYS_SOC
+        default "am33xx"
+
+config SYS_CONFIG_NAME
+        default "etamin"
+
+endif