um: Use tty_port_operations->destruct
authorRichard Weinberger <richard@nod.at>
Mon, 11 Mar 2013 09:03:42 +0000 (10:03 +0100)
committerRichard Weinberger <richard@nod.at>
Mon, 11 Mar 2013 09:08:03 +0000 (10:08 +0100)
As we setup the SIGWINCH handler in tty_port_operations->activate
it makes sense to tear down it in ->destruct.

Signed-off-by: Richard Weinberger <richard@nod.at>

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