backlight: ktz8866: Fix module autoloading

Add MODULE_DEVICE_TABLE(), so modules could be properly autoloaded
based on the alias from of_device_id table.

Signed-off-by: Liao Chen <[e-mail]>
Reviewed-by: Daniel Thompson <[e-mail]>
Reviewed-by: Jianhua Lu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/ktz8866.c

···
 	},
 	{},
 };
+MODULE_DEVICE_TABLE(of, ktz8866_match_table);
 
 static struct i2c_driver ktz8866_driver = {
 	.driver = {