coexist: enable coexist when wifi&bt are enabled, disable coexist when one of wifi&bt is disabled.

components/esp32/include/esp_coexist.h

@@ -25,6 +25,11 @@ extern "C" {
  */
 esp_err_t coex_init(void);
 
+/**
+ * @brief De-init software coexist
+ */
+void coex_deinit(void);
+
 /**
  * @brief Get software coexist enable or not
  *