IB/mlx5: Fix error unwinding when set_has_smi_cap fails

When set_has_smi_cap() fails, multiport master cleanup is missed. Fix it
by doing the correct error unwinding goto.

Fixes: a989ea01

 ("RDMA/mlx5: Move SMI caps logic")
Link: https://lore.kernel.org/r/20210113121703.559778-3-leon@kernel.org
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>