feat(esp_eth): a new folder structure of the driver and other improvements

Fixed memory leak in emac_esp_new_dma function.

Polished ESP EMAC cache management.

Added emac_periph definitions based on SoC features and improved(generalized) ESP EMAC GPIO
initialization.

Added ESP EMAC GPIO reservation.

Added check for frame error condition indicated by EMAC DMA and created a target test.

examples/ethernet/basic/components/ethernet_init/ethernet_init.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
@@ -24,6 +24,18 @@ extern "C" {
  */
 esp_err_t example_eth_init(esp_eth_handle_t *eth_handles_out[], uint8_t *eth_cnt_out);
 
+/**
+ * @brief De-initialize array of Ethernet drivers
+ * @note All Ethernet drivers in the array must be stopped prior calling this function.
+ *
+ * @param[in] eth_handles array of Ethernet drivers to be de-initialized
+ * @param[in] eth_cnt number of Ethernets drivers to be de-initialized
+ * @return
+ *          - ESP_OK on success
+ *          - ESP_ERR_INVALID_ARG when passed invalid pointers
+ */
+esp_err_t example_eth_deinit(esp_eth_handle_t *eth_handles, uint8_t eth_cnt);
+
 #ifdef __cplusplus
 }
 #endif