[OpenPower-Firmware] op-build v1.21.1 released

[Stewart Smith]

Release Notes for OpenPower Firmware v1.21.1
============================================

This is a point release on top of op-build v1.21.

Like v1.21, this release is NOT intended for GA POWER9 platforms, for that,
op-build v2.0 is *required*.

Changes since v1.21:

- skiboot v5.10.1
  - libflash/blocklevel: Correct miscalculation in blocklevel_smart_erase()
  - NPU2 HMIs: dump out a *LOT* of npu2 registers for debugging
- linux 4.14.22-openpower1
  - 40be210c830e powerpc: Fix DABR match on hash based systems
  - 3b09911d3beb powerpc/xive: Use hw CPU ids when configuring the CPU queues
  - 892674b5058a powerpc/mm: Flush radix process translations when setting MMU type
  - 4386f223b418 powerpc/numa: Invalidate numa_cpu_lookup_table on cpu remove
  - 5b98d31481f9 powerpc/radix: Remove trace_tlbie call from radix__flush_tlb_all
  - c3bdd547042f rtc-opal: Fix handling of firmware error codes, prevent busy loops
  - 8e56a935a4b7 cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin



-- 
Stewart Smith
OPAL Architect, IBM.