AHCI - Chip reset, Inquiry alignment, ATAPI adjustments, Intel attach

AHCI - Chip reset, Inquiry alignment, ATAPI adjustments, Intel attach

* When resetting the chip set AE before issuing HR and leave AE set
  when issuing HR.  After reset is complete, set AE again.

* Do Intel hocus pocus at config register 0x92 for Intel chipsets.

* The only PIO request is basically the initial INQUIRY during probe.
  Make sure the structure does not cross a page boundary so only one
  DRQ buffer is needed.  Very old AHCI chipsets may need this.

* Make minor flags adjustments for PIO setup commands during the
  initial probe.

* Reduce verbosity slightly.