Merge pull request ARMmbed#14724 from jeromecoutant/PR_G0PWR

STM32G0: correct voltage scaling control

Author: 0xc0170

targets/TARGET_STM/TARGET_STM32G0/TARGET_STM32G031xx/TARGET_NUCLEO_G031K8/system_clock.c

@@ -99,6 +99,7 @@ uint8_t SetSysClock_PLL_HSI(void)
 
     /** Configure the main internal regulator output voltage
     */
+    __HAL_RCC_PWR_CLK_ENABLE();
     HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
     /** Initializes the CPU, AHB and APB busses clocks
     */

targets/TARGET_STM/TARGET_STM32G0/TARGET_STM32G071xx/TARGET_NUCLEO_G071RB/system_clock.c

@@ -97,6 +97,7 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
 
     /** Configure the main internal regulator output voltage
     */
+    __HAL_RCC_PWR_CLK_ENABLE();
     HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
     /** Initializes the CPU, AHB and APB busses clocks
     */
@@ -139,6 +140,7 @@ uint8_t SetSysClock_PLL_HSI(void)
 
     /** Configure the main internal regulator output voltage
     */
+    __HAL_RCC_PWR_CLK_ENABLE();
     HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
     /** Initializes the CPU, AHB and APB busses clocks
     */