Cosmetic changes from review of last PR

arch/arm/src/stm32/stm32_adc.c

@@ -1667,6 +1667,7 @@ static void adc_dmaconvcallback(DMA_HANDLE handle, uint8_t isr, FAR void *arg)
             }
         }
     }
+
   /* Restart DMA for the next conversion series */
 
   adc_modifyreg(priv, STM32_ADC_DMAREG_OFFSET, ADC_DMAREG_DMA, 0);

arch/arm/src/stm32f7/stm32_adc.c

@@ -1479,17 +1479,19 @@ static uint32_t adc_sqrbits(FAR struct stm32_dev_s *priv, int first, int last,
 static bool adc_internal(FAR struct stm32_dev_s * priv)
 {
   int i;
+
   if (priv->intf == 1)
     {
       for (i  = 0; i < priv->nchannels; i++)
         {
-            if (priv->chanlist[i] > ADC_LAST_EXTERNAL_CHAN)
-              {
-                return true;
-              }
+          if (priv->chanlist[i] > ADC_LAST_EXTERNAL_CHAN)
+            {
+              return true;
+            }
 
         }
     }
+
   return false;
 }