fix(esp_phy): fix pll track corner case

components/esp_phy/include/esp_private/phy.h

@@ -168,6 +168,12 @@ void phy_clr_modem_flag(esp_phy_modem_t modem);
  *
  */
 esp_phy_modem_t phy_get_modem_flag(void);
+
+/**
+ * @brief Get the PHY lock, only used in esp_phy, the user should not use this function.
+ *
+ */
+_lock_t phy_get_lock(void);
 #ifdef __cplusplus
 }
 #endif