tc: Fix using uninitialized id chain.

tc: Fix using uninitialized id chain.

tc_make_tcf_id() doesn't initialize the 'chain' field leaving it with a
random value from the stack.  This makes request_from_tcf_id() create
request with random TCA_CHAIN included.  These requests are obviously
doesn't work as needed leading to broken flow dump and various other
issues.  Fix that by using designated initializer instead.

Fixes: acdd544c4c9a ("tc: Introduce tcf_id to specify a tc filter")
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>