m68k updates for 4.19

  - Enable mac_scsi PDMA on PowerBook 500,
  - Generic dma_noncoherent_ops conversion,
  - Time handling improvements,
  - I/O accessor improvements,
  - Conversion to MEMBLOCK and NO_BOOTMEM, to bring m68k in line with
    other mainstream architectures,
  - Miscellaneous fixes and cleanups,
  - Defconfig updates.
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m68k/defconfig: Update defconfigs for v4.18-rc6

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
12 files changed