Patch for setting UDMA levels independently

[dukzcry]

Hi, list.

Just looked through my patches archive, and found this:
https://raw.github.com/druga/aeriebsd-
tree/master/sys/arch/macppc/dev/wdc_obio.diff

Live action, as well:
kauaiata0 at pci2 dev 13 function 0 "Apple Intrepid 2 ATA" rev 0x00
wdc0 at kauaiata0 irq 39: DMA
wd0 at wdc0 channel 0 drive 0: <ST9160821A>
atapiscsi0 at wdc0 channel 0 drive 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <MATSHITA, DVD-R UJ-846, FAAG> SCSI0

wd0(wdc0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4
cd0(wdc0:0:1): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4
wd0(wdc0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 5
cd0(wdc0:0:1): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4