fix(esp_hw_support): fix current leakage if ext32k slow clock source not exists

components/soc/esp32c2/include/soc/rtc.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2020-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -263,6 +263,11 @@ void rtc_clk_xtal_freq_update(rtc_xtal_freq_t xtal_freq);
  */
 void rtc_clk_32k_enable_external(void);
 
+/**
+ * @brief Disable 32KHz external oscillator
+ */
+void rtc_clk_32k_disable_external(void);
+
 /**
  * @brief Enable or disable 8 MHz internal oscillator
  *