deinit BB MAC back memory when they are not used

components/esp_phy/include/esp_phy_init.h

@@ -181,6 +181,11 @@ void esp_phy_load_cal_and_init(void);
  */
 void esp_mac_bb_pd_mem_init(void);
 
+/**
+ * @brief Deinitialize backup memory for MAC and Baseband power up/down
+ */
+void esp_mac_bb_pd_mem_deinit(void);
+
 /**
  * @brief Power up MAC and Baseband
  */