Input: tca8418 - fix loading this driver as a module from a device tree

Loading the tca8418 driver as a module on a device tree based system needs
a MODULE_ALIAS because the driver name does not match the automatic
name generation rules of a 'compatible' entry on i2c bus.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/tca8418_keypad.c

@@ -392,6 +392,13 @@ static const struct of_device_id tca8418_dt_ids[] = {
 	{ }
 };
 MODULE_DEVICE_TABLE(of, tca8418_dt_ids);
+
+/*
+ * The device tree based i2c loader looks for
+ * "i2c:" + second_component_of(property("compatible"))
+ * and therefore we need an alias to be found.
+ */
+MODULE_ALIAS("i2c:tca8418");
 #endif
 
 static struct i2c_driver tca8418_keypad_driver = {