atmel-samd: Fix CDC by making sure we define (#294)
atmel-samd: Fix CDC by making sure we define (#294)

CONF_USB_COMPOSITE_CDC_ACM_EN before including ASF4 files.
adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython