additional ata changes for 6.9-rc1

 - A single fix for ASMedia HBAs.
   These HBAs do not indicate that they support SATA Port Multipliers
   CAP.SPM (Supports Port Multiplier) is not set.

   Likewise, they do not allow you to probe the devices behind an
   attached PMP, as defined according to the SATA-IO PMP specification.

   Instead, they have decided to implement their own version of PMP,
   and because of this, plugging in a PMP actually works, even if the
   HBA claims that it does not support PMP.

   Revert a recent quirk for these HBAs, as that breaks ASMedia's own
   implementation of PMP.

   Unfortunately, this will once again give some users of these HBAs
   significantly increased boot time. However, a longer boot time for
   some, is the lesser evil compared to some other users not being able
   to detect their drives at all.
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