Merge branch 'netem-add-nsec-scheduling-and-slot-feature'

Dave Taht says:

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netem: add nsec scheduling and slot feature

This patch series converts netem away from the old "ticks" interface and
userspace API, and adds support for a new "slot" feature intended to
emulate bursty macs such as WiFi and LTE better.

Changes since v2:
Use u64 for packet_len_sched_time()
Use simpler max(time_to_send,q->slot.slot_next)

Changes since v1:
Always pass new nanosecond APIs to userspace
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Signed-off-by: David S. Miller <davem@davemloft.net>