Projectkk2glider/issue 4086 usb and serial (#4097)

* Serial2 changes:
  * stm32 driver moved to common dir.
  * earlier start of driver (Taranis)
  * wait for free buffer time limited
USB changes:
 * Upgrade to ST USB-Host-Device_Lib_V2.2.0 (from V2.1.0) - this fixed a problem with USB serial #4086)
 * other fixes for #4086

* USB-Host-Device_Lib: renamed directory to V2.2.0 (from V2.1.0)

radio/src/targets/taranis/board.cpp

@@ -23,8 +23,8 @@
 #if defined(__cplusplus) && !defined(SIMU)
 extern "C" {
 #endif
-#include "STM32_USB-Host-Device_Lib_V2.1.0/Libraries/STM32_USB_OTG_Driver/inc/usb_dcd_int.h"
-#include "STM32_USB-Host-Device_Lib_V2.1.0/Libraries/STM32_USB_OTG_Driver/inc/usb_bsp.h"
+#include "usb_dcd_int.h"
+#include "usb_bsp.h"
 #if defined(__cplusplus) && !defined(SIMU)
 }
 #endif
@@ -139,6 +139,11 @@ void boardInit()
   i2cInit();
   usbInit();
 
+#if defined(DEBUG)
+  serial2Init(0, 0); // default serial mode (None if DEBUG not defined)
+  TRACE("\nTaranis board started :)");
+#endif
+
 #if defined(HAPTIC)
   hapticInit();
 #endif