Use original names for config parameters

The config parameter names defined in the relay_chn_defs.h file
have been changed back to their original names (with the CONFIG_ prefix),
so that they are not confused with application-level defines.

Refs #1085

private_include/relay_chn_output.h

@@ -36,7 +36,7 @@ esp_err_t relay_chn_output_init(const uint8_t* gpio_map, uint8_t gpio_count);
  */
 void relay_chn_output_deinit(void);
 
-#if RELAY_CHN_COUNT > 1
+#if CONFIG_RELAY_CHN_COUNT > 1
 /**
  * @brief Get the relay channel output object for a specific channel.
  *
@@ -59,7 +59,7 @@ relay_chn_output_t *relay_chn_output_get_all(void);
  * @return Pointer to relay channel output object.
  */
 relay_chn_output_t *relay_chn_output_get(void);
-#endif // RELAY_CHN_COUNT > 1
+#endif // CONFIG_RELAY_CHN_COUNT > 1
 
 /**
  * @brief Stop the relay channel output.