AHCI - Fix PM probing issues, wait 10 seconds on physical port insertion

AHCI - Fix PM probing issues, wait 10 seconds on physical port insertion

* The spec is not completely clear on the point but CCB[1] *MUST* be used
  as the second CCB in a softreset sequence.  If it isn't, the wrong
  signature may be loaded into the signature register.

* Wait 10 seconds on insertion of a physical port (we already wait 10 seconds
  on the insertion of a target behind a PM).

* Do not cycle the PHY when doing a hard reset, it seems to create
  detection problems.