x86: link: Tidy up the command lines options

We may as well use hush. The auto-complete option was incorrect so this was
not enabled. Also expand the command line size a little and go back to the
default prompt since "boot>" doesn't seem any more useful.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/coreboot.h b/include/configs/coreboot.h
index ce614c8..f55b332 100644
--- a/include/configs/coreboot.h
+++ b/include/configs/coreboot.h
@@ -109,7 +109,8 @@
 
 #define CONFIG_CMDLINE_EDITING
 #define CONFIG_COMMAND_HISTORY
-#define CONFIG_AUTOCOMPLETE
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_SYS_HUSH_PARSER
 
 #define CONFIG_SUPPORT_VFAT
 /************************************************************
@@ -208,8 +209,7 @@
  * Miscellaneous configurable options
  */
 #define CONFIG_SYS_LONGHELP
-#define CONFIG_SYS_PROMPT			"boot > "
-#define CONFIG_SYS_CBSIZE			256
+#define CONFIG_SYS_CBSIZE			512
 #define CONFIG_SYS_PBSIZE			(CONFIG_SYS_CBSIZE + \
 						 sizeof(CONFIG_SYS_PROMPT) + \
 						 16)