Fix below build error when using LVGL:
applications/lvgl/lv_port_indev.c(73): error: use of undeclared
identifier 'BOARD_Touch_I2C_Send'
.I2C_SendFunc = BOARD_Touch_I2C_Send,
^
applications/lvgl/lv_port_indev.c(74): error: use of undeclared
identifier 'BOARD_Touch_I2C_Receive'
.I2C_ReceiveFunc = BOARD_Touch_I2C_Receive,
^
applications/lvgl/lv_port_indev.c(154): warning: implicit declaration of
function 'BOARD_LPI2C_Init' is invalid in C99
[-Wimplicit-function-declaration]
BOARD_LPI2C_Init(TOUCH_I2C, TOUCH_I2C_CLOCK_FREQ);
^
Signed-off-by: Ting Liu <ting.liu@nxp.com>