This step generates a defination looks like "CONFIG_LCD_PANELNAME=y" in .config file.
#ifdef CONFIG_LCD_AT070TN93
static struct platform_device at07070tn93_lcd = {
.name = "at07070tn93_lcd",
.dev = {
.platform_data = &lcd_pdata,
},
};
#endif
Then register it to the platform bus.