avr32: stk1002 and ngw100 convergence

Make STK1002 and NGW100 boards act more alike:
  - STK boards can use as many arguments as NGW
  - STK boards don't need to manage FPGAs either
  - NGW commands should match STK ones

Also spell U-Boot right in prompts for STK1002 and NGW100.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
[haavard.skinnemoen@atmel.com: update STK100[34] as well]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
diff --git a/include/configs/atngw100.h b/include/configs/atngw100.h
index 5aad043..313298a 100644
--- a/include/configs/atngw100.h
+++ b/include/configs/atngw100.h
@@ -112,8 +112,11 @@
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_JFFS2
 #define CONFIG_CMD_MMC
+
+#undef CONFIG_CMD_AUTOSCRIPT
 #undef CONFIG_CMD_FPGA
 #undef CONFIG_CMD_SETGETDCR
+#undef CONFIG_CMD_XIMG
 
 #define CONFIG_ATMEL_USART		1
 #define CONFIG_MACB			1
@@ -164,7 +167,7 @@
 #define CFG_BOOTPARAMS_LEN		(16 * 1024)
 
 /* Other configuration settings that shouldn't have to change all that often */
-#define CFG_PROMPT			"Uboot> "
+#define CFG_PROMPT			"U-Boot> "
 #define CFG_CBSIZE			256
 #define CFG_MAXARGS			16
 #define CFG_PBSIZE			(CFG_CBSIZE + sizeof(CFG_PROMPT) + 16)