ktls: fix vnet-related panic in ktls_reset_receive_tag()

[mm]

Summary

I have reproducibly triggered a panic with sorele() in ktls_reset_receive_tag() being out of vnet context when using a mlx5 with KTLS with lagg and vlan.

[jhb]

For future reference, uploading diffs with context (e.g. with git-arc) makes reviewing easier. I don't think we need the vnet around if_rele() (in case it calls if_free), so I think this is correct.

[gallatin]

In D43400#989566, @jhb wrote:

For future reference, uploading diffs with context (e.g. with git-arc) makes reviewing easier. I don't think we need the vnet around if_rele() (in case it calls if_free), so I think this is correct.

You can also provide context on diffs using 'git diff -U999999'.