Merge pull request #1734 from svastm/fix_adc_f746zg

[STM32F7] Fix end of conversion

Author: 0xc0170

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F7/analogin_api.c

@@ -190,7 +190,7 @@ static inline uint16_t adc_read(analogin_t *obj)
 
     // Wait end of conversion and get value
     HAL_ADC_PollForConversion(&AdcHandle, 10);
-    if (HAL_ADC_GetState(&AdcHandle) == HAL_ADC_STATE_EOC_REG) {
+    if (HAL_ADC_GetState(&AdcHandle) & HAL_ADC_STATE_EOC_REG) {
         return (HAL_ADC_GetValue(&AdcHandle));
     } else {
         return 0;