Enable LNA by default t096, tracker v2, heltec v4

variants/heltec_t096/LoRaFEMControl.h

@@ -17,6 +17,6 @@ class LoRaFEMControl
     bool isLNAEnabled(void) const { return lna_enabled; }
 
   private:
-    bool lna_enabled = false;
+    bool lna_enabled = true;
     bool lna_can_control = false;
 };

variants/heltec_tracker_v2/LoRaFEMControl.h

@@ -17,6 +17,6 @@ class LoRaFEMControl
     bool isLNAEnabled(void) const { return lna_enabled; }
 
   private:
-    bool lna_enabled = false;
+    bool lna_enabled = true;
     bool lna_can_control = false;
 };

variants/heltec_v4/LoRaFEMControl.h

@@ -24,7 +24,7 @@ class LoRaFEMControl
     LoRaFEMType getFEMType(void) const { return fem_type; }
   private:
     LoRaFEMType fem_type=OTHER_FEM_TYPES;
-    bool lna_enabled=false;
+    bool lna_enabled=true;
     bool lna_can_control=false;
 };