siemens,at91: enable features for smartweb

New features for smartweb:
* switch to hush command parser
* change autoboot stop to <ESC><ESC>
* allow to write ethaddr

Signed-off-by: Matthias Michel <matthias.michel@siemens.com>
Reviewed-by: Samuel Egli <samuel.egli@siemens.com>
Cc: Roger Meier <r.meier@siemens.com>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/configs/smartweb_defconfig b/configs/smartweb_defconfig
index ee4340f..654bb4b 100644
--- a/configs/smartweb_defconfig
+++ b/configs/smartweb_defconfig
@@ -3,4 +3,7 @@
 CONFIG_TARGET_SMARTWEB=y
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9260"
-CONFIG_SYS_PROMPT="U-Boot> "
+CONFIG_SYS_PROMPT="U-Boot# "
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Autobooting in %d seconds, press \"<Esc><Esc>\" to stop\n"
+CONFIG_AUTOBOOT_STOP_STR="\x1b\x1b"