pwm: renesas-tpu: Add MODULE_ALIAS to make module auto loading work

This driver can be built as module, add MODULE_ALIAS to make module auto loading
work.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-renesas-tpu.c

@@ -471,3 +471,4 @@ module_platform_driver(tpu_driver);
 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 MODULE_DESCRIPTION("Renesas TPU PWM Driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:renesas-tpu-pwm");