fix:补回LCD demo缺失内容

demo/lcd/main.lua

@@ -120,6 +120,9 @@ else
     -- lcd.init("nv3037",{port = port,pin_dc = pin_dc, pin_pwr = bl, pin_rst = pin_reset,direction = 0,w = 320,h = 480,xoffset = 0,yoffset = 0,interface_mode=lcd.DATA_2_LANE},spi_lcd)
     
     -- lcd.init("st7789",{port = port,pin_dc = pin_dc, pin_pwr = bl, pin_rst = pin_reset,direction = 0,w = 240,h = 320,xoffset = 0,yoffset = 0},spi_lcd)
+	-- [[ QSPI接口无RAM屏幕，必须开启lcd_use_buff ]]
+	-- lcd.init("jd9261t_inited",{port = port,pin_dc = pin_dc, pin_pwr = bl, pin_rst = pin_reset,direction = 0,w = 480,h = 480,xoffset = 0,yoffset = 0,interface_mode=lcd.QSPI_MODE,bus_speed=60000000,flush_rate=658,vbp=19,vfp=108,vs=2},spi_lcd)
+	-- lcd_use_buff = true
 end
 
 --如果显示颜色相反，请解开下面一行的注释，关闭反色