net/bonding: Take update_features call out of XFRM funciton

In preparation for more cases that call netdev_update_features().

While here, move the features logic to the stage where struct bond
is already updated, and pass it as the only parameter to function
bond_set_xfrm_features().

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Boris Pismenny <borisp@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>