net/mlx5: re-indent generic probing function
net/mlx5: re-indent generic probing function

Since commit "net/mlx5: drop useless support for several Verbs ports"
removed an inner loop, mlx5_dev_spawn() is left with an unnecessary indent
level.

This patch eliminates a block, moves its local variables to function scope,
and re-indents its contents (diff best viewed with --ignore-all-space).

No functional impact.

Signed-off-by: Adrien Mazarguil <9d39ea493ca46c560334f650ac5d4b5ffbcb5cf0@6wind.com>
Reviewed-by: Xueming Li <a578f76ca98b1dec92e0d1baef814b93f3f2f3b4@mellanox.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk