ARM: u300: probe the U300 dummy-spichip from device tree

This probes the U300 dummy-spichip from the device tree
and adds the apropriate node to the tree.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/mach-u300/dummyspichip.c b/arch/arm/mach-u300/dummyspichip.c
index 2785cb6..52962bf 100644
--- a/arch/arm/mach-u300/dummyspichip.c
+++ b/arch/arm/mach-u300/dummyspichip.c
@@ -263,10 +263,16 @@
 	return 0;
 }
 
+static const struct of_device_id pl022_dummy_dt_match[] = {
+	{ .compatible = "arm,pl022-dummy" },
+	{},
+};
+
 static struct spi_driver pl022_dummy_driver = {
 	.driver = {
 		.name	= "spi-dummy",
 		.owner	= THIS_MODULE,
+		.of_match_table = pl022_dummy_dt_match,
 	},
 	.probe	= pl022_dummy_probe,
 	.remove	= pl022_dummy_remove,