Patch for Nominal Media Rotation Rate field of AHCI disk.

[Peter Grehan]

Hi Qian,

> I have a patch for Nominal Media Rotation Rate field.
> currently bhyve will not report this field.

  Nice !

  I was thinking another way to do this would be to change the device 
emulation name for this i.e. "ata-ssd" instead of "ata-hd" with an 
additional parameter.

  That way some additional parameters and fields could be changed, such 
as the name presented in the identify device data.

later,

Peter.