wl12xx: add platform driver to the core module

Nnow that we have a platform_device on both glue layers, add a
platform_driver to the core driver.

It's currently an empty platform_driver but more functionality will be
added on later patches.

Signed-off-by: Felipe Balbi <balbi@ti.com>
[forward-ported, cleaned-up and rephrased commit message]
[added platform_driver.driver initialization]
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/main.c

@@ -5200,6 +5200,45 @@ int wl1271_free_hw(struct wl1271 *wl)
 }
 EXPORT_SYMBOL_GPL(wl1271_free_hw);
 
+static int __devinit wl12xx_probe(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static int __devexit wl12xx_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static const struct platform_device_id wl12xx_id_table[] __devinitconst = {
+	{ "wl12xx-sdio", 0 },
+	{ "wl12xx-spi", 0 },
+	{  } /* Terminating Entry */
+};
+MODULE_DEVICE_TABLE(platform, wl12xx_id_table);
+
+static struct platform_driver wl12xx_driver = {
+	.probe		= wl12xx_probe,
+	.remove		= __devexit_p(wl12xx_remove),
+	.id_table	= wl12xx_id_table,
+	.driver = {
+		.name	= "wl12xx",
+		.owner	= THIS_MODULE,
+	}
+};
+
+static int __init wl12xx_init(void)
+{
+	return platform_driver_register(&wl12xx_driver);
+}
+module_init(wl12xx_init);
+
+static void __exit wl12xx_exit(void)
+{
+	platform_driver_unregister(&wl12xx_driver);
+}
+module_exit(wl12xx_exit);
+
 u32 wl12xx_debug_level = DEBUG_NONE;
 EXPORT_SYMBOL_GPL(wl12xx_debug_level);
 module_param_named(debug_level, wl12xx_debug_level, uint, S_IRUSR | S_IWUSR);