* grub-core/bus/usb/uhci.c (grub_uhci): Add chunk and phys members.
(grub_uhci_pci_iter): Fill new members
(grub_alloc_td): Use P2V and V2P functions.
(grub_free_queue): Likewise.
(grub_alloc_qh): Likewise.
(grub_uhci_setup_transfer): Likewise.
(grub_uhci_check_transfer): Likewise.