ARDUINO_DISCO_F411VE fix broken usb

Author: pschatzmann

variants/STM32F4xx/F411V(C-E)T/variant_DISCO_F411VE.cpp

@@ -155,7 +155,7 @@ WEAK void SystemClock_Config(void)
   RCC_OscInitStruct.PLL.PLLM = 4;
   RCC_OscInitStruct.PLL.PLLN = 192;
   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
-  RCC_OscInitStruct.PLL.PLLQ = 4;
+  RCC_OscInitStruct.PLL.PLLQ = 8;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
     Error_Handler();
   }