esp_rom: implement usb deinit functions added in S3 ROM for S2

This cleans up usb_console.c and prepares it for S3 support.

components/esp_rom/CMakeLists.txt

@@ -295,5 +295,5 @@ else() # Regular app build
 endif()
 
 if(target STREQUAL "esp32s2")
-    target_sources(${COMPONENT_LIB} PRIVATE "esp32s2/usb_descriptors.c")
+    target_sources(${COMPONENT_LIB} PRIVATE "esp32s2/usb_patches.c")
 endif()

components/esp_rom/esp32s2/usb_descriptors.c → components/esp_rom/esp32s2/usb_patches.c

@@ -65,3 +65,19 @@ void rom_usb_cdc_set_descriptor_patch(void)
     /* Override the pointer to descriptors structure */
     rom_usb_curr_desc = &s_acm_usb_descriptors_override;
 }
+
+/* On ESP32-S2, ROM doesn't provide interfaces to clear usb_dev and usb_dw_ctrl structures.
+ * Starting from ESP32-S3, usb_dev_deinit and usb_dw_ctrl_deinit ROM functions are available.
+ * Here we implement the missing functionality for the ESP32-S2.
+ */
+void usb_dev_deinit(void)
+{
+    extern char rom_usb_dev, rom_usb_dev_end;
+    memset((void *) &rom_usb_dev, 0, &rom_usb_dev_end - &rom_usb_dev);
+}
+
+void usb_dw_ctrl_deinit(void)
+{
+    extern char rom_usb_dw_ctrl, rom_usb_dw_ctrl_end;
+    memset((void *) &rom_usb_dw_ctrl, 0, &rom_usb_dw_ctrl_end - &rom_usb_dw_ctrl);
+}

components/esp_system/port/soc/esp32s2/usb_console.c

@@ -232,12 +232,9 @@ void esp_usb_console_before_restart(void)
  */
 static void esp_usb_console_rom_cleanup(void)
 {
-    extern char rom_usb_dev, rom_usb_dev_end;
-    extern char rom_usb_dw_ctrl, rom_usb_dw_ctrl_end;
-
+    usb_dev_deinit();
+    usb_dw_ctrl_deinit();
     uart_acm_dev = NULL;
-    memset((void *) &rom_usb_dev, 0, &rom_usb_dev_end - &rom_usb_dev);
-    memset((void *) &rom_usb_dw_ctrl, 0, &rom_usb_dw_ctrl_end - &rom_usb_dw_ctrl);
 }
 
 esp_err_t esp_usb_console_init(void)