[OpenBIOS] sparc esp scsi fixes

[Blue Swirl]

>The ESP SCSI driver currently doesn't check whether a DMA requests has
>completed before checking its status. On older qemu versions this works ok
>because DMA happens instantly. On never qemu DMA can take an indeterminate
>amount of time ooto complete, just like on real hardware.
>
>The patch below waits for the controller to raise the DMA interrupt after
>initiating a DMA request.

Looks good to me. Please apply.

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/