SPIN_LOCK_UNLOCKED has been deprecated since 2.6.19 and will get removed
in 2.6.39, so replace it with DEFINE_SPINLOCK().
Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26770 3c298f89-4303-0410-b956-a3cf2f4a3e73