rapidio: convert bus code to use dev_groups

The dev_attrs field of struct bus_type is going away soon, dev_groups
should be used instead.  This converts the rapidio bus code to use the
correct field.

Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c
index 2be2d24..c9ae692 100644
--- a/drivers/rapidio/rio-driver.c
+++ b/drivers/rapidio/rio-driver.c
@@ -223,7 +223,7 @@
 struct bus_type rio_bus_type = {
 	.name = "rapidio",
 	.match = rio_match_bus,
-	.dev_attrs = rio_dev_attrs,
+	.dev_groups = rio_dev_groups,
 	.bus_groups = rio_bus_groups,
 	.probe = rio_device_probe,
 	.remove = rio_device_remove,