Add support for NVIDIA Jetson NX

Author: nvswarren

adafruit_platformdetect/constants/boards.py

@@ -38,6 +38,7 @@
 JETSON_TX2 = 'JETSON_TX2'
 JETSON_XAVIER = 'JETSON_XAVIER'
 JETSON_NANO = 'JETSON_NANO'
+JETSON_NX = 'JETSON_NX'
 
 # Google Coral dev board
 CORAL_EDGE_TPU_DEV = "CORAL_EDGE_TPU_DEV"
@@ -120,6 +121,12 @@
         'nvidia,p3450-0002',
         'nvidia,jetson-nano',
     ),
+    JETSON_NX: (
+        'nvidia,p3509-0000+p3668-0000',
+        'nvidia,p3509-0000+p3668-0001',
+        'nvidia,p3449-0000+p3668-0000',
+        'nvidia,p3449-0000+p3668-0001',
+    ),
 }
 
 _RASPBERRY_PI_40_PIN_IDS = (