Merge changes If1c86979,I96faf1e5,Id83afbd4,I0ca6c44c,I5d8ce65e,I39fa4657,I359f8def into msm-next

* changes:
  ARM: dts: msm: Add rcu_nocbs kernel parameter to chosen node
  defconfig: sdm855: Use RCU_NOCB for RCU subsystem
  firmware_class: Avoid pending list corruption
  firmware: Initialize firmware_buf list when we create a new firmware buf
  firmware: Reword error messages when kernel is unable to find firmware
  firmware: Avoid caching firmware when FW_OPT_NOCACHE is set
  Revert "firmware_class: Add an additional path to fw_path list"