[simu] Updates for RTOS abstraction layer; Remove further SIMU_SLEEP usages.

radio/src/io/bootloader_flash.cpp

@@ -61,8 +61,11 @@ void bootloaderFlash(const char * filename)
       flashWrite(CONVERT_UINT_PTR(FIRMWARE_ADDRESS+i+j), (uint32_t *)(buffer+j));
     }
     drawProgressBar(STR_WRITING, i, BOOTLOADER_SIZE);
-    if (!SIMU_SLEEP(30/*ms*/))
+#if defined(SIMU)
+    // add an artificial delay and check for simu quit
+    if (SIMU_SLEEP_OR_EXIT_MS(30))
       break;
+#endif
   }
 
   if (unlocked) {