[PATCH] Fix deadlock in ip6_queue

[NETFILTER]: Fix deadlock in ip6_queue

Already fixed in ip_queue, ip6_queue was missed.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>