ports/zephyr: Switch BLE to extmod/zephyr_ble integration.#21

andrewleech wants to merge 3 commits intopr/zephyr-ble-stm32andrewleech/micropython:pr/zephyr-ble-stm32from

pr/zephyr-ble-zephyrandrewleech/micropython:pr/zephyr-ble-zephyrCopy head branch name to clipboard