- As a baind-aid, disable ATAPI DMA when using ATA_CAM for these controllers   as well as it causes the kernel to hang during boot.   Reported and tested by: Kevin Oberman - Use NULL instead of 0 for a pointer.
- As a baind-aid, disable ATAPI DMA when using ATA_CAM for these controllers
  as well as it causes the kernel to hang during boot.
  Reported and tested by: Kevin Oberman
- Use NULL instead of 0 for a pointer.

MFC after:	3 days

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