digsy mtc: Enable command line history.

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>

include/configs/digsy_mtc.h

@@ -272,6 +272,7 @@
  */
 #define CONFIG_SYS_LONGHELP
 #define CONFIG_AUTO_COMPLETE	1
+#define CONFIG_CMDLINE_EDITING	1
 #define CONFIG_SYS_PROMPT	"=> "
 #define CONFIG_SYS_HUSH_PARSER
 #define CONFIG_SYS_PROMPT_HUSH_PS2	"> "