board: Nucleo-G474RE: use HSE instead of HSI (#1376)

* board: Nucleo-G474RE: use HSE instead of HSI

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

* fix: astyle

Author: fpistm

variants/STM32G4xx/G473R(B-C-E)T_G474R(B-C-E)T_G483RET_G484RET/variant_NUCLEO_G474RE.cpp

@@ -113,14 +113,13 @@ WEAK void SystemClock_Config(void)
   /* Configure the main internal regulator output voltage */
   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);
   /* Initializes the CPU, AHB and APB busses clocks */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48;
-  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
-  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48 | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
   RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
-  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
-  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
-  RCC_OscInitStruct.PLL.PLLN = 85;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV2;
+  RCC_OscInitStruct.PLL.PLLN = 28;
   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;