Currently, if an error occurred during mlx5_function_setup(), we
keep dev->state as DEVICE_STATE_UP.
Fixing it by adding a goto label.

Fixes: e161105e ("net/mlx5: Function setup/teardown procedures")
Signed-off-by: Shay Drory <shayd@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>