HID: google: Add of_match table to Whiskers switch device.

Add a device tree match table for "cros-cbas" switch device.
Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-google-hammer.c

@@ -17,6 +17,7 @@
 #include <linux/hid.h>
 #include <linux/leds.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_data/cros_ec_commands.h>
 #include <linux/platform_data/cros_ec_proto.h>
 #include <linux/platform_device.h>
@@ -272,12 +273,21 @@ static const struct acpi_device_id cbas_ec_acpi_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, cbas_ec_acpi_ids);
 
+#ifdef CONFIG_OF
+static const struct of_device_id cbas_ec_of_match[] = {
+	{ .compatible = "google,cros-cbas" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, cbas_ec_of_match);
+#endif
+
 static struct platform_driver cbas_ec_driver = {
 	.probe = cbas_ec_probe,
 	.remove = cbas_ec_remove,
 	.driver = {
 		.name = "cbas_ec",
 		.acpi_match_table = ACPI_PTR(cbas_ec_acpi_ids),
+		.of_match_table = of_match_ptr(cbas_ec_of_match),
 		.pm = &cbas_ec_pm_ops,
 	},
 };