chore(cmake): CMake cleanup and simplifications (#2620)

* CMake cleanup and simplifications

* Position Independent Code is need for radiolib_native

* Some more cleanup & repair

* Fix SIMU_SRC scope issue

* fix: avoid warnings due to assembler statements from StdPeriph on arm64 native

radio/src/targets/simu/simueeprom.cpp

@@ -125,16 +125,15 @@ void eepromStartWrite(uint8_t * buffer, size_t address, size_t size)
   eepromTransmitData(address, buffer, size, false);
 }
 
+bool _eeprom_write_simu_delay = true;
+
 void eepromWriteBlock(uint8_t * buffer, size_t address, size_t size)
 {
   eepromStartWrite(buffer, address, size);
 
   while (!eepromIsTransferComplete()) {
-#if defined(GTESTS)
-    sleep(0/*ms*/);
-#else
-    sleep(1/*ms*/);
-#endif
+    if (_eeprom_write_simu_delay)
+      sleep(1/*ms*/);
   }
 }