IB/core: Consider adding default GIDs of bond device

Now that we correctly delete the default GIDs of lower devices during
CHANGEUPPER event, add default GIDs of the bonding master device.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>