adafruit_fruit_jam: expose the DVI display as board.DISPLAY

The auto-constructed picodvi/HSTX display lands in displays[0] (via
picodvi_autoconstruct) but was only reachable through supervisor.runtime.display,
so code reading board.DISPLAY.width/height (the size-independent convention) hit
AttributeError. Map board.DISPLAY to displays[0].framebuffer_display, matching
adafruit_feather_rp2040_dvi. Lets games run unchanged on the Fruit Jam.

Author: lynt-smitka

ports/raspberrypi/boards/adafruit_fruit_jam/pins.c

@@ -6,6 +6,7 @@
 
 #include "py/objtuple.h"
 #include "shared-bindings/board/__init__.h"
+#include "shared-module/displayio/__init__.h"
 
 // Four consecutive data GPIOs for the 4-bit SDIO interface (sdioio.SDCard).
 static const mp_rom_obj_tuple_t sdio_data_tuple = {
@@ -22,6 +23,10 @@ static const mp_rom_obj_tuple_t sdio_data_tuple = {
 static const mp_rom_map_elem_t board_module_globals_table[] = {
     CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
 
+    // Expose the auto-constructed DVI/HSTX display as board.DISPLAY (like adafruit_feather_rp2040_dvi),
+    // so code that reads board.DISPLAY.width/height works instead of only supervisor.runtime.display.
+    { MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&displays[0].framebuffer_display) },
+
 
     // On JST PH connector.
     { MP_OBJ_NEW_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO40) },