Thinknode m4 - don't touch crystal and OTA name

variants/thinknode_m4/variant.cpp

@@ -10,8 +10,8 @@
 
 const uint32_t g_ADigitalPinMap[] =
 {
-  0,  // P0.00
-  1,  // P0.01
+  0xff,  // P0.00 - LFXO (do not use)
+  0xff,  // P0.01 - LFXO (do not use)
   2,  // P0.02
   3,  // P0.03
   4,  // P0.04