Extend LVGL package configuration

[pioneerAlone]

为lvgl package 添加了一些宏配置，便于启用一些功能，涉及的宏如下：

#define LV_TICK_CUSTOM 0
#define LV_MEM_CUSTOM 0
#define LV_COLOR_16_SWAP 0
#define LV_USE_FS_STDIO 0
#define LV_USE_FREETYPE 0

/*Use STM32's DMA2D (aka Chrom Art) GPU*/
#define LV_USE_GPU_STM32_DMA2D 0
#if LV_USE_GPU_STM32_DMA2D
    /*Must be defined to include path of CMSIS header of target processor
    e.g. "stm32f769xx.h" or "stm32f429xx.h"*/
    #define LV_GPU_DMA2D_CMSIS_INCLUDE
#endif

/*Change the built in (v)snprintf functions*/
#define LV_SPRINTF_CUSTOM 0
#if LV_SPRINTF_CUSTOM
    #define LV_SPRINTF_INCLUDE <stdio.h>
    #define lv_snprintf  snprintf
    #define lv_vsnprintf vsnprintf
#else   /*LV_SPRINTF_CUSTOM*/

#define LV_SPRINTF_USE_FLOAT 0

#endif /LV_SPRINTF_CUSTOM/