Permit Gameduino 3X Dazzler support on that board.

Totally untested, change request based on change made in #2581.
It might be my first PR in CircuitPython core...
Maybe this should be confirmed by @jamesbowman

Those are the two boards that seems supported:
* Metro M4 Express
* Metro nRF52840 Express

The only Metro that this PR concern:
* Metro M4 AirLift Lite

Other Metro I found and are maybe not supported:
* Metro ESP32-S2
* Metro M0 Express
* Metro M7 1011

Author: dglaude

ports/atmel-samd/boards/metro_m4_airlift_lite/mpconfigboard.mk

@@ -10,3 +10,5 @@ QSPI_FLASH_FILESYSTEM = 1
 EXTERNAL_FLASH_DEVICE_COUNT = 3
 EXTERNAL_FLASH_DEVICES = "S25FL116K, S25FL216K, GD25Q16C"
 LONGINT_IMPL = MPZ
+
+CIRCUITPY__EVE = 1