Portduino: Allow limiting TX Power from yaml (#5954)

src/mesh/SX128xInterface.cpp

@@ -10,6 +10,9 @@
 #endif
 
 // Particular boards might define a different max power based on what their hardware can do
+#if ARCH_PORTDUINO
+#define SX128X_MAX_POWER settingsMap[sx128x_max_power]
+#endif
 #ifndef SX128X_MAX_POWER
 #define SX128X_MAX_POWER 13
 #endif
@@ -315,4 +318,4 @@ template <typename T> bool SX128xInterface<T>::sleep()
 
     return true;
 }
-#endif
+#endif