Fix config parameters check

Unnecessary `#if CONFIG_FOO == 1` checks were removed and the
statements were simplified to` #if CONFIG_FOO`.
`#ifdef CONFIG_FOO` statements were also changed to `#if CONFIG_FOO`
to keep the style as uniform as possible.

Refs #1085

private_include/relay_chn_core.h

@@ -28,7 +28,7 @@ extern "C" {
  */
 esp_err_t relay_chn_init_timer(relay_chn_ctl_t *chn_ctl);
 
-#if CONFIG_RELAY_CHN_ENABLE_RUN_LIMIT == 1
+#if CONFIG_RELAY_CHN_ENABLE_RUN_LIMIT
 /**
  * @brief Initializes the relay channel run limit timer.
  *