ofproto-dpif-rid: Use separate pointers for actions and action set.

ofproto-dpif-rid: Use separate pointers for actions and action set.

During translation it makes some sense to concatenate these in a single
array, but in my opinion it's conceptually better to separate them for
the recirc_state; they are not naturally the same thing.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Jarno Rajahalme <jarno@ovn.org>