* Fix rtos include path in NRFCordioHCIDriver
* Flatten USB driver directory structure
* Add missing include for us_ticker
* Add more missing includes for us_ticker
* Fix mbed_hal_fpga_ci_test_shield/uart test
* Fix bare-metal build
* Fix Watchdog UNITTEST
* Fix Mbed OS 2 build for Public/Internal headers relocating
- code refactoring and preparation for enabling DPI/QPI tests
- reduced multiple test count to 4
- use common flash config header for all MX25RXX35F chips
- fix sector erase max time on N25Q128A
Main idea of introduced changes is to ease adding support for new flash chips
Major changes:
- move implementation of all memory chip specific functions to memory config file (no weak functions)
- add support for 1-2-2 write