driver model: constify attribute groups

Let attribute group vectors be declared "const".  We'd
like to let most attribute metadata live in read-only
sections... this is a start.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 8ae0f63..ed2ebd3 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -181,7 +181,7 @@
 EXPORT_SYMBOL_GPL(put_driver);
 
 static int driver_add_groups(struct device_driver *drv,
-			     struct attribute_group **groups)
+			     const struct attribute_group **groups)
 {
 	int error = 0;
 	int i;
@@ -201,7 +201,7 @@
 }
 
 static void driver_remove_groups(struct device_driver *drv,
-				 struct attribute_group **groups)
+				 const struct attribute_group **groups)
 {
 	int i;