ODroid go: use full MAC address prefix

Otherwise it's way too easy to conflict with other boards.

internal_filesystem/lib/mpos/board/lilygo_t_watch_s3_plus.py

@@ -108,8 +108,7 @@ print("(x,y,z): ", sensor.get_xyz())
 
 # TODO:
 # - battery
-# - IMU
-# - vibrator
+# - real IMU driver (instead of proof-of-concept above)
 # - GPS
 # - LoRa
 

internal_filesystem/lib/mpos/main.py

@@ -101,7 +101,7 @@ def detect_board():
             return "lilygo_t_display_s3" # display gets confused by the i2c stuff below
 
         print("odroid_go ?")
-        if unique_id_prefixes[0] == 0x30:
+        if unique_id_prefixes == b'\x30\xae\xa4':
             return "odroid_go"
 
         print("fri3d_2026 ?")