sched/time: Introduce CLOCK_THREAD_DVFS_ID In order to measure thread time in a DVFS world, introduce CLOCK_THREAD_DVFS_ID -- a copy of CLOCK_THREAD_CPUTIME_ID that slows down with both DVFS scaling and CPU capacity. The clock does *NOT* support setting timers. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>