[RFC] patch to AHCI device detection code

[Andrey V. Elsukov]

Søren Schmidt wrote:
> Well, as you can see I tried this when I added the PM code to AHCI, 
> however one of the reasons I left it out again (for now) is that it 
> doesn't work on more than about 50% of the AHCI chipsets out there..
> 
> Modern HW in a nutshell, you win some you loose some ;)

Hm.. I think it can't made regression. I don't see nothing dangerous
in addition 1s waiting (it doesn't enable softreset code, only PxTFD
reading loop)..

-- 
WBR, Andrey V. Elsukov