boards/esp32s2-lilygo-ttgo-t8: add TTY board filter

When using `make flash` or `make term` with `MOST_RECENT_PORT=1`, RIOT
should now only consider plausible TTYs and select the most recently
connected one. The filter is a bit broad, though, and will match
any board with a CH430 UART2USB bridge. But depending on the boards
attached, it might be good enough to reliably tell it apart from
other boards.

boards/esp32s2-lilygo-ttgo-t8/Makefile.include

@@ -5,3 +5,7 @@ ifneq (,$(filter esp32s2-lilygo-ttgo-t8-usb,$(USEMODULE)))
 endif
 
 include $(RIOTBOARD)/common/esp32s2/Makefile.include
+
+# Only consider TTYs matching the following filter when auto-selecting the TTY
+# with `MOST_RECENT_PORT=1`.
+TTY_BOARD_FILTER := --driver 'ch341' --vendor '1a86' --model 'USB Serial'