ahci: add DT binding for Calxeda AHCI controller

Add devicetree match table to ahci platform driver for Calxeda Highbank
AHCI controller.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index c03277d..004f2ce 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -202,11 +202,18 @@
 	return 0;
 }
 
+static const struct of_device_id ahci_of_match[] = {
+	{ .compatible = "calxeda,hb-ahci", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ahci_of_match);
+
 static struct platform_driver ahci_driver = {
 	.remove = __devexit_p(ahci_remove),
 	.driver = {
 		.name = "ahci",
 		.owner = THIS_MODULE,
+		.of_match_table = ahci_of_match,
 	},
 	.id_table	= ahci_devtype,
 };