video: da8xx-fb: improve readability of code

Change the lcd_disable_raster funtion from using a bool to an enum
as the function is very confusing with the current api.  This helps
make it clearer what the parameter is really doing.

Signed-off-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/include/video/da8xx-fb.h b/include/video/da8xx-fb.h
index f888259..efed3c3 100644
--- a/include/video/da8xx-fb.h
+++ b/include/video/da8xx-fb.h
@@ -23,6 +23,11 @@
 	LOAD_PALETTE,
 };
 
+enum da8xx_frame_complete {
+	DA8XX_FRAME_WAIT,
+	DA8XX_FRAME_NOWAIT,
+};
+
 struct da8xx_lcdc_platform_data {
 	const char manu_name[10];
 	void *controller_data;