attribute to them, just in case something other than the pciide driver proper needs to pull in the header.
both 756 and 766.
disable multiword DMA for these chips. multiword DMA can be forced with options PCIIDE_AMD756_ENABLEDMA on rev D2 chips, but use at your own risk ! While I'm there remove a duplicate allocation of sc_wdcdev.nchannels in HPT code.
PR kern/9536 by Dave Sainty.