input: Add the keycode translation tables separately

Require the caller to add the keycode translation tables separately so that
it can select which ones to use. In a later patch we will add the option to
add German tables.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/input.h

@@ -122,6 +122,16 @@ int input_stdio_register(struct stdio_dev *dev);
 void input_set_delays(struct input_config *config, int repeat_delay_ms,
 	       int repeat_rate_ms);
 
+/**
+ * Set up the key map tables
+ *
+ * This must be called after input_init() or keycode decoding will not work.
+ *
+ * @param config	Input state
+ * @return 0 if ok, -1 on error
+ */
+int input_add_tables(struct input_config *config);
+
 /**
  * Set up the input handler with basic key maps.
  *