Fix whitespace and dereference error in espressif FrequencyIn

Author: vickash

ports/espressif/common-hal/countio/Counter.c

@@ -28,7 +28,7 @@ void common_hal_countio_counter_construct(countio_counter_obj_t *self,
 
     // initialize PCNT
     CHECK_ESP_RESULT(pcnt_new_unit(&unit_config, &self->unit));
-    
+
     // Set watchpoints at limis, to auto-accumulate overflows.
     pcnt_unit_add_watch_point(self->unit, INT16_MIN);
     pcnt_unit_add_watch_point(self->unit, INT16_MAX);

ports/espressif/common-hal/frequencyio/FrequencyIn.c

@@ -41,10 +41,10 @@ static esp_err_t init_pcnt(frequencyio_frequencyin_obj_t *self) {
     if (result != ESP_OK) {
         return result;
     }
-    
+
     // Set watchpoints at limis, to auto-accumulate overflows.
-    pcnt_unit_add_watch_point(self->unit, INT16_MIN);
-    pcnt_unit_add_watch_point(self->unit, INT16_MAX);
+    pcnt_unit_add_watch_point(self->internal_data->unit, INT16_MIN);
+    pcnt_unit_add_watch_point(self->internal_data->unit, INT16_MAX);
 
     pcnt_chan_config_t channel_config = {
         .edge_gpio_num = self->pin,