drivercore: Add of_match_table to the common device drivers

OF-style matching can be available to any device, on any type of bus.
This patch allows any driver to provide an OF match table when CONFIG_OF
is enabled so that drivers can be bound against devices described in
the device tree.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index 48a5f04..e3ba1d8 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -40,8 +40,7 @@
 static int macio_bus_match(struct device *dev, struct device_driver *drv) 
 {
 	struct macio_dev * macio_dev = to_macio_device(dev);
-	struct macio_driver * macio_drv = to_macio_driver(drv);
-	const struct of_device_id * matches = macio_drv->match_table;
+	const struct of_device_id * matches = drv->of_match_table;
 
 	if (!matches) 
 		return 0;
@@ -84,7 +83,7 @@
 
 	macio_dev_get(macio_dev);
 
-	match = of_match_device(drv->match_table, &macio_dev->ofdev);
+	match = of_match_device(drv->driver.of_match_table, &macio_dev->ofdev);
 	if (match)
 		error = drv->probe(macio_dev, match);
 	if (error)