【修改】为了适配F469-DISCO的LCD驱动，增加使用“BSP_USING_LTDC”时所引用的库函数文件

Signed-off-by: NWillian Chan <chentingwei@rt-thread.com>

bsp/stm32/libraries/STM32F4xx_HAL/SConscript

@@ -104,6 +104,7 @@ if GetDepend(['BSP_USING_LTDC']):
     src += ['STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_ltdc_ex.c']
     src += ['STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma2d.c']
     src += ['STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_dma2d.c']
+    src += ['STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dsi.c']
 
 path = [cwd + '/STM32F4xx_HAL_Driver/Inc',
     cwd + '/CMSIS/Device/ST/STM32F4xx/Include',