[dm][graphic] support ili9486 SPI LCD driver

Signed-off-by: GuEe-GUI <2991707448@qq.com>

components/drivers/graphic/framebuffer/Kconfig

@@ -3,6 +3,12 @@ menuconfig RT_GRAPHIC_FB
     select RT_USING_LCD
     default y
 
+config RT_GRAPHIC_FB_ILI9486
+    bool "ILI9486 framebuffer support"
+    depends on RT_GRAPHIC_FB
+    depends on RT_USING_SPI
+    default n
+
 config RT_GRAPHIC_FB_SIMPLE
     bool "Simple framebuffer support"
     depends on RT_GRAPHIC_FB

components/drivers/graphic/framebuffer/SConscript

@@ -11,6 +11,9 @@ CPPPATH = [cwd + '/../../include']
 
 src     = []
 
+if GetDepend(['RT_GRAPHIC_FB_ILI9486']):
+    src += ['fb-ili9486.c']
+
 if GetDepend(['RT_GRAPHIC_FB_SIMPLE']):
     src += ['fb-simple.c']