stm32: Fix init sequence of USB hardware and TinyUSB stack.

This commit fixes the initialization sequence for TinyUSB when enabled on
the stm32 port:

- Following other ports, `mp_usbd_init()` should be called just after
  running `boot.py`, to give the user a chance to configure USB.

- Hardware initialization (via `pyb_usbd_init()`) should only occur once,
  the first time TinyUSB is started up.  This is achieved by adding a hook
  to the shared TinyUSB bindings to call `pyb_usbd_init()`, and only do the
  hardware init if TinyUSB was not already initialized.

Also, `pyb_usbd_init()` is renamed `mp_usbd_ll_init()` to make it match
with the rest of the stared TinyUSB binding code.

Signed-off-by: Damien George <damien@micropython.org>

0 files changed, 0 insertions, 0 deletions