feature: Support ili9488 driver

Signed-off-by: lbuque <1102390310@qq.com>

Author: lbuque

examples/tft_config/ili9488/README.md

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+lcd: http://www.lcdwiki.com/zh/3.5inch_SPI_Module_ILI9488_SKU:MSP3520#.E5.B8.B8.E7.94.A8.E8.BD.AF.E4.BB.B6

examples/tft_config/ili9488/image2lcd_setting.png

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+from machine import Pin, SPI
+import lcd
+
+def config():
+    hspi = SPI(2, sck=Pin(19), mosi=Pin(23), miso=None)
+    panel = lcd.SPIPanel(spi=hspi, command=Pin(21), cs=Pin(22), pclk=60 * 1000 * 1000, width=320, height=480)
+    ili = lcd.ILI9488(panel, reset=Pin(18), backlight=Pin(5), color_space=lcd.ILI9488.BGR, bits_per_pixel=18)
+    ili.backlight_on()
+    ili.reset()
+    ili.init()
+    ili.invert_color(False)
+    return ili