Pull spi fixes from Mark Brown:
 "A few small fixes for v5.16, one in the core for an issue with
  handling of controller unregistration that was introduced with the
  fixes for registering nested SPI controllers and a few more minor
  device specific ones"

* tag 'spi-fix-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: fix use-after-free of the add_lock mutex
  spi: spi-geni-qcom: fix error handling in spi_geni_grab_gpi_chan()
  spi: lpspi: Silence error message upon deferred probe
  spi: cadence-quadspi: fix write completion support