Merge tag 'spi-fix-v5.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark BrownL
 "This contains a couple of fixes, one fix for handling of zero length
  transfers on Rockchip devices and a warning fix which will conflict
  with a version you did but cleans up some extra unneeded forward
  declarations as well which seems a bit neater"

* tag 'spi-fix-v5.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: tegra20-slink: Declare runtime suspend and resume functions conditionally
  spi: rockchip: handle zero length transfers without timing out