mceusb xhci fix

Change the I/O endpoint handling of the mceusb driver to respect the endpoint 
type reported by device (bulk/interrupt), rather than treating all endpoints 
as type interrupt, which breaks devices using bulk endpoints when connected 
to a xhci controller.  Accordingly, change the function calls to initialize 
an endpoint's transfer pipe and urb handlers to use the correct function based 
on the endpoint type.

TL,DR: fix MCE USB remotes using bulk endpoint transfers when used with USB 3.0 controllers.