timers-core-2020-08-04

 - Prevent unnecessary timer softirq invocations by extending the tracking
   of the next expiring timer in the timer wheel beyond the existing NOHZ
   functionality. The tracking overhead at enqueue time is within the
   noise, but on sensitive workloads the avoidance of the soft interrupt
   invocation is a measurable improvement.

 - The obligatory new clocksource driver for Ingenic X100 OST

 - The usual fixes, improvements, cleanups and extensions for newer chip
   variants all over the driver space.