pinctrl: loongson2: fix module autoloading

Add MODULE_DEVICE_TABLE(), so the module could be properly autoloaded
based on the alias from of_device_id table. Pin controllers are
considered core components, so usually they are built-in, however these
can be built and used as modules on some generic kernel.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/pinctrl-loongson2.c

···
 	},
 	{ }
 };
+MODULE_DEVICE_TABLE(of, loongson2_pinctrl_dt_match);
 
 static struct platform_driver loongson2_pinctrl_driver = {
 	.probe		= loongson2_pinctrl_probe,