Merge tag 'xtensa-20180225' of git://

Pull Xtensa fixes from Max Filippov:
 "Two fixes for reserved memory/DMA buffers allocation in high memory on
  xtensa architecture

   - fix memory accounting when reserved memory is in high memory region

   - fix DMA allocation from high memory"

* tag 'xtensa-20180225' of git://
  xtensa: support DMA buffers in high memory
  xtensa: fix high memory/reserved memory collision