This patch added USB PCI-OHCI chips support, interrupt pipe support
and usb event poll support. For supporting the USB interrupt pipe, the
globe urb_priv is moved to purb in ed struct. Now, we can process
several urbs at one time. The interrupt pipe support codes are ported
from Linux kernel 2.4.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
and adapted board configs TQM5200 and yosemite accordingly. This commit
also makes the maximum number of root hub ports configurable
(CFG_USB_OHCI_MAX_ROOT_PORTS).