add & pass a first few test for cdc host
implement cdch_open_subtask
fix compilation error
add acm_capability saving to host data & its test
house keeping
rename usbh_isr to usbh_xfer_isr
change control xfer check in usbh_xfer_isr
rename
- async_list_process_isr to async_list_xfer_complete_isr
- period_list_process_isr to period_list_xfer_complete_isr

extract function void qhd_xfer_complete_isr(ehci_qhd_t * p_qhd, tusb_transfer_type_t xfer_type)
add cdc host driver close cdch_close
refractor
- add helper function in ehci qhd_next & qtd_next
- extract function qhd_create_pipe_handle
rename tusb_transfer_type_t to tusb_xfer_type_t
add some handling for stall
refractor code