ras-urgent-2020-03-15

  - Shut down the per CPU thermal throttling poll work properly when a CPU
    goes offline. The missing shutdown caused the poll work to be migrated
    to a unbound worker which triggered warnings about the usage of
    smp_processor_id() in preemptible context

  - Fix the PPIN feature initialization which missed to enable the
    functionality when PPIN_CTL was enabled but the MSR locked against
    updates.