RDMA/mlx5: Update SRQ functions signatures to mlx5_ib format

Reflect the change of moving SRQ code from mlx5_core to mlx5_ib by
updating function signatures do not require mlx5_core_dev as an input,
because all operations in mlx5_ib are supposed to use mlx5_ib_dev.

Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>