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

tannewt · dhalbert · commit bac841df61b3 · 2017-09-29T16:03:05.000-04:00
CONF_USB_COMPOSITE_CDC_ACM_EN before including ASF4 files.
diff --git a/atmel-samd/usb.c b/atmel-samd/usb.c
@@ -28,6 +28,10 @@
 
 #include <stdint.h>
 
+// We must include this early because it sets values used in the ASF4 includes
+// below.
+#include "py/mpconfig.h"
+
 #include "hal/include/hal_gpio.h"
 #include "usb/class/cdc/device/cdcdf_acm.h"
 // #include "hiddf_mouse.h"
