kernel: add missing 3.12 config symbols

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38546 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: fix compile error in 3.12

Upstream commit c655bc6896b94ee0223393f26155c6daf1e2d148 changed number of
arguments in nf_ct_iterate_cleanup() function.

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38547 3c298f89-4303-0410-b956-a3cf2f4a3e73