bonding: fix bond_ipsec_offload_ok return type

[ Upstream commit fc59b9a5f7201b9f7272944596113a82cc7773d5 ]

Fix the return type which should be bool.

Fixes: 955b785e ("bonding: fix suspicious RCU usage in bond_ipsec_offload_ok()")
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>