mfd: Enable ab8500-gpadc driver for Device Tree

This patch will allow the ab8500-gpadc driver to be probed during
Device Tree enabled boot.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/ab8500-gpadc.c

@@ -648,12 +648,18 @@ static int __devexit ab8500_gpadc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id ab8500_gpadc_match[] = {
+	{ .compatible = "stericsson,ab8500-gpadc", },
+	{}
+};
+
 static struct platform_driver ab8500_gpadc_driver = {
 	.probe = ab8500_gpadc_probe,
 	.remove = __devexit_p(ab8500_gpadc_remove),
 	.driver = {
 		.name = "ab8500-gpadc",
 		.owner = THIS_MODULE,
+		.of_match_table = ab8500_gpadc_match,
 	},
 };