* Update toolchain to 2021r2 (#5828) * Update C3 libs to support only ECO3 and newer
* Fix build compilation due to changes in the HW_TIMER's structs * Fix compilation warnings and errors with USB * Update USBCDC.cpp * Update CMakeLists.txt * Update HWCDC.cpp
esp-dsp: master f4d7d6e esp-face: master 420fc7e esp-rainmaker: f1b82c7 esp32-camera: master 6a9497b esp_littlefs: master b58f00c