bonding: delete always true device check

XFRM API makes sure that xs->xso.dev is valid in all XFRM offload
callbacks. There is no need to check it again.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/0b2f8f5f09701bb43bbd83b94bfe5cb506b57adc.1738587150.git.leon@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>