tty,vt: fix VT_SETACTIVATE console switch

using VT_SETACTIVATE ioctl for console switch did not work,
since it put wrong param to the set_console function.

Also ioctl returned misleading error, because of the missing
break statement. I wonder anyone has ever used this one :).

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>