[ofw] ib_send_wr_t vaddr byte-order

[Sean Hefty]

>It appears to be in host order, based on looking at the WSD provider code.
>
>It probably should be in network order, though.

gurgle... this would break compatibility...

Maybe we can keep uAL in host order, but change the UVPs to use network order?

Otherwise, we can just deal with this funkiness in the API, and I'll change
winverbs to use host order as well...