OMAP4: Enable command line editing in omap4_common.h

Signed-off-by: John Rigby <john.rigby@linaro.org>
diff --git a/include/configs/omap4_common.h b/include/configs/omap4_common.h
index eec630b..4082791 100644
--- a/include/configs/omap4_common.h
+++ b/include/configs/omap4_common.h
@@ -214,6 +214,7 @@
  * Miscellaneous configurable options
  */
 
+#define CONFIG_CMDLINE_EDITING
 #define CONFIG_SYS_LONGHELP	/* undef to save memory */
 #define CONFIG_SYS_HUSH_PARSER	/* use "hush" command parser */
 #define CONFIG_SYS_CBSIZE		512