ARM: rmobile: Enable autocompletion on Gen3

This makes the shell so much more pleasant to use, so enable it.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

include/configs/rcar-gen3-common.h

@@ -16,6 +16,7 @@
 
 /* boot option */
 #define CONFIG_SUPPORT_RAW_INITRD
+#define CONFIG_AUTO_COMPLETE
 
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS