Fixed bug for LilyGo T-display (espressif#8744)

Fixed bug by adding upload.flags and upload.extra_flags to LilyGo T-display

Author: thebear132

boards.txt

@@ -3678,6 +3678,8 @@ lilygo_t_display.upload.maximum_size=1310720
 lilygo_t_display.upload.maximum_data_size=327680
 lilygo_t_display.upload.wait_for_upload_port=true
 lilygo_t_display.upload.speed=460800
+lilygo_t_display.upload.flags=
+lilygo_t_display.upload.extra_flags=
 
 lilygo_t_display.bootloader.tool=esptool_py
 lilygo_t_display.bootloader.tool.default=esptool_py