of: refactor of_modalias_node() and remove explicit match table.

This patch tightens up the behaviour of of_modalias_node() to be more
predicatable and to eliminate the explicit of_modalias_tablep[] that
is currently used to override the first entry in the compatible list
of a device.  The override table was needed originally because spi
and i2c drivers had no way to do of-style matching.  Now that all
devices can have an of_node pointer, and all drivers can have an
of_match_table, the explicit override table is no longer needed
because each driver can specify its own OF-style match data.

The mpc8349emitx-mcu driver is modified to explicitly specify the
correct device to bind against.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
index 59b0ed1a..70798ac 100644
--- a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
+++ b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
@@ -160,10 +160,16 @@
 };
 MODULE_DEVICE_TABLE(i2c, mcu_ids);
 
+static struct of_device_id mcu_of_match_table[] __devinitdata = {
+	{ .compatible = "fsl,mcu-mpc8349emitx", },
+	{ },
+};
+
 static struct i2c_driver mcu_driver = {
 	.driver = {
 		.name = "mcu-mpc8349emitx",
 		.owner = THIS_MODULE,
+		.of_match_table = mcu_of_match_table,
 	},
 	.probe = mcu_probe,
 	.remove	= __devexit_p(mcu_remove),