[LR11x0] Prevent WiFi scanning attempts on LR1121 (#1290)

src/modules/LR11x0/LR1121.h

@@ -21,9 +21,6 @@ class LR1121: public LR1120 {
     */
     LR1121(Module* mod); // cppcheck-suppress noExplicitConstructor
 
-    // TODO this is where overrides to disable GNSS+WiFi scanning methods on LR1121
-    // will be put once those are implemented
-
 #if !RADIOLIB_GODMODE
   private:
 #endif

src/modules/LR11x0/LR11x0.cpp

@@ -1512,6 +1512,11 @@ int16_t LR11x0::setLrFhssConfig(uint8_t bw, uint8_t cr, uint8_t hdrCount, uint16
 }
 
 int16_t LR11x0::startWifiScan(char wifiType, uint8_t mode, uint16_t chanMask, uint8_t numScans, uint16_t timeout) {
+  // LR1121 cannot do WiFi scanning
+  if(this->chipType == RADIOLIB_LR11X0_DEVICE_LR1121) {
+    return(RADIOLIB_ERR_UNSUPPORTED);
+  }
+
   uint8_t type;
   switch(wifiType) {
     case('b'):