Commonize USB
[USB] Add commonized driver for USB STM32F0 line (prepared for L0)

Pioneer work originally by Kuldeep Singh Dhaka. Code reformatted.

Signed-off-by: Frantisek Burian <BuFran@seznam.cz>
[STM32F0] add support of autotrimming HSI to USB SOF frames

Signed-off-by: Frantisek Burian <BuFran@seznam.cz>