i2o: 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 i2o bus code to use the
correct field.

Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/message/i2o/driver.c b/drivers/message/i2o/driver.c
index 813eaa3..b6b92d7 100644
--- a/drivers/message/i2o/driver.c
+++ b/drivers/message/i2o/driver.c
@@ -62,7 +62,7 @@
 struct bus_type i2o_bus_type = {
 	.name = "i2o",
 	.match = i2o_bus_match,
-	.dev_attrs = i2o_device_attrs
+	.dev_groups = i2o_device_groups,
 };
 
 /**