Merge #19287

19287: boards/esp32s2-lilygo-ttgo-t8: fix STDIO selection in Kconfig r=benpicco a=gschorcht

### Contribution description

This PR fixes the default STDIO selection in Kconfig in case the USB port is connected to the USB to UART bridge which is then used for STDIO (default). It solves the compilation problems in the nightly build.

The PR also includes a very small documentation fix.

### Testing procedure

Green CI.

The compilations that caused problems  in nightly build should pass:
```
python3 dist/tools/compile_test/compile_like_murdock.py -a tests/pkg_tinyusb_cdc_msc -b  esp32s2-lilygo-ttgo-t8 -j8
```
```
python3 dist/tools/compile_test/compile_like_murdock.py -a tests/sys_fido2_ctap/ -b  esp32s2-lilygo-ttgo-t8 -j8
```
```
python3 dist/tools/compile_test/compile_like_murdock.py -a tests/usbus_board_reset/ -b  esp32s2-lilygo-ttgo-t8 -j8
```

### Issues/PRs references


Co-authored-by: Gunar Schorcht <gunar@schorcht.net>

boards/esp32s2-lilygo-ttgo-t8/Kconfig

@@ -28,7 +28,7 @@ config BOARD_ESP32S2_LILYGO_TTGO_T8
     select HAVE_MTD_SDCARD_DEFAULT
     select HAVE_ST7735
     select MODULE_FATFS_VFS if MODULE_VFS_DEFAULT
-    select MODULE_USBUS_CDC_ACM if MODULE_USBUS
+    select MODULE_USBUS_CDC_ACM if MODULE_USBUS && ESP32S2_LILYGO_TTGO_T8_USB
 
 menu "LILYGO TTGO T8 ESP32-S2 Board configurations"
     depends on BOARD_ESP32S2_LILYGO_TTGO_T8
@@ -54,8 +54,8 @@ menu "LILYGO TTGO T8 ESP32-S2 Board configurations"
 endmenu
 
 choice STDIO_IMPLEMENTATION
-    default MODULE_STDIO_CDC_ACM if MODULE_USBUS
-    default MODULE_STDIO_TINYUSB_CDC_ACM if MODULE_TINYUSB_DEVICE
+    default MODULE_STDIO_CDC_ACM if MODULE_USBUS && ESP32S2_LILYGO_TTGO_T8_USB
+    default MODULE_STDIO_TINYUSB_CDC_ACM if MODULE_TINYUSB_DEVICE && ESP32S2_LILYGO_TTGO_T8_USB
 endchoice
 
 source "$(RIOTBOARD)/common/esp32s2/Kconfig"

boards/esp32s2-lilygo-ttgo-t8/doc.txt

@@ -72,11 +72,11 @@ can also be used by other devices.
 The LILYGO TTGO T8 ESP32-S2 has a USB-to-UART bridge on board. The USB D-/D+
 signals of the USB-C connector are connected via DIP switches either to this
 USB-to-UART bridge (default) or to GPIO19/GPIO20 of the ESP32-S2. To use the
-USB-OTG interface of the ESP32-S2, the USB D-/D+ signals must be connected to
+USB OTG interface of the ESP32-S2, the USB D-/D+ signals must be connected to
 GPIO19 and GPIO20, see section \ref esp32s2_lilygo_ttgo_t8_pinout "Pinout".
-If the USB-to-UART bridge is used, module `stdio_cdc_acm` or module
-`stdio_tinyusb_cdc_acm` can be enabled to use the USB interface also for the
-console.
+To use the USB OTG interface also for the console in this case, either the
+`stdio_cdc_acm` or the `stdio_tinyusb_cdc_acm` module must be enabled.
+This is automatically the case if the USBUS or tinyUSB stack is used.
 
 The LILYGO TTGO T8 ESP32-S2 has a 32.768 kHz crystal on the board, which is
 connected to GPIO15 and GPIO16 via DIP switches (default). The crystal can