Pull Xtensa updates from Max Filippov:

 - switch xtensa arch to the generic noncoherent direct mapping
   operations

 - add support for DMA_ATTR_NO_KERNEL_MAPPING attribute

 - clean up users of platform/hardware.h in generic Xtensa code

 - fix assembly cache maintenance code for long cache lines

 - rework noMMU cache attributes initialization

 - add big-endian HiFi2 test_kc705_be CPU variant

* tag 'xtensa-20180820' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: add test_kc705_be variant
  xtensa: clean up boot-elf/bootstrap.S
  xtensa: make bootparam parsing optional
  xtensa: drop variant IRQ support
  xtensa: drop unneeded platform/hardware.h headers
  xtensa: move PLATFORM_NR_IRQS to Kconfig
  xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_START
  xtensa: drop unused {CONFIG,PLATFORM}_DEFAULT_MEM_SIZE
  xtensa: rework noMMU cache attributes initialization
  xtensa: increase ranges in ___invalidate_{i,d}cache_all
  xtensa: limit offsets in __loop_cache_{all,page}
  xtensa: platform-specific handling of coherent memory
  xtensa: support DMA_ATTR_NO_KERNEL_MAPPING attribute
  xtensa: use generic dma_noncoherent_ops