feat: add support for H7 USB voltage detector (#5423)

radio/src/targets/common/arm/stm32/stm32_hal_ll.h

@@ -78,6 +78,7 @@ extern "C" {
   #include "STM32H7xx_HAL_Driver/Inc/stm32h7xx_ll_spi.h"
   #include "STM32H7xx_HAL_Driver/Inc/stm32h7xx_ll_iwdg.h"
   #include "STM32H7xx_HAL_Driver/Inc/stm32h7xx_ll_usb.h"
+  #include "STM32H7xx_HAL_Driver/Inc/stm32h7xx_ll_pwr.h"
 #endif
 
 #if defined(__cplusplus)

radio/src/targets/common/arm/stm32/usb_driver.cpp

@@ -118,6 +118,10 @@ void usbInit()
   #error "Unable to enable USB peripheral clock"
 #endif
 
+#if defined(STM32H7) || defined(STM32H7RS)
+  LL_PWR_EnableUSBVoltageDetector();
+#endif
+
   usbDriverStarted = false;
 }
 
@@ -160,8 +164,10 @@ void usbStart()
       //USBD_Init(&hUsbDeviceFS, USB_OTG_FS_CORE_ID, &USR_desc, &USBD_MSC_cb, &USR_cb);
       break;
   }
-  USBD_Start(&hUsbDeviceFS);
-  usbDriverStarted = true;
+
+  if (USBD_Start(&hUsbDeviceFS) == USBD_OK) {
+    usbDriverStarted = true;
+  }
 }
 
 void usbStop()