kernel: dtcp: reset next_snd_ctl_seq in rl_normal_sdu_rx
kernel: dtcp: reset next_snd_ctl_seq in rl_normal_sdu_rx

This is used to avoid sender dropping control PDU because of wrong
seqnum, that would happen when the inactivity timer has expired on
the receiver, but has not expired on the sender.

autrimpo/rlite,vmaffione/rlite,vmaffione/rlite,autrimpo/rlite,autrimpo/rlite,autrimpo/rlite,vmaffione/rlite,vmaffione/rlite