The message exactly is:

uhci0 at pci0 dev 16 function 0: VIA Technologies VT83C572 USB 
Controller (rev. 0x80)
pci_intr_map: no mapping for pin A (line=ff)
uhci0: couldn't map interrupt
uhci1 at pci0 dev 16 function 1: VIA Technologies VT83C572 USB 
Controller (rev. 0x80)
pci_intr_map: no mapping for pin B (line=ff)
uhci1: couldn't map interrupt
uhci2 at pci0 dev 16 function 2: VIA Technologies VT83C572 USB 
Controller (rev. 0x80)
pci_intr_map: no mapping for pin C (line=ff)
uhci2: couldn't map interrupt
-- 
Signed,
Dan Harrison