CherryUSB v1.5.1

This release needs to be urgent because some companies need the custom configuration for multi dwc2 usbip and the qtd bug for ehci.

Common

• update kconfig @MDLZCOOL @sakumisu

Device

• update(core/usbd_core): add ep0 state log

Host

• fix(vendor/serial/usbh_ftdi): fix missing break
• fix(class/hub): change urb interval unit to us

Port

• refactor(port/dwc2): support custom config for each dwc2 usb port
• feat: support sifli device
• fix(port/ehci): Fix the urb leak when there is no data in the control transmission @minlewang
• update(port/dwc2/usb_dc_dwc2): use usbd_get_ep0_next_state for read setup

Platform

• feat(platform/rtthread): support adb shell/device cdc acm chardev/host serial framework
• fix(platform/rtthread): change dfs ssize_t to rt_ssize_t

Security Check

• update(demo): remove ep num check
• update(port/fsdev): assert for fsdev log