video:cache:fix: Enable dcache flush at LCD subsystem for Exynos based boards

lcd_set_flush_dcache(1) function is called from exynos_fb.c configuration file
to enable lcd_sync function.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/drivers/video/exynos_fb.c b/drivers/video/exynos_fb.c
index d9a3f9a..aac74a3 100644
--- a/drivers/video/exynos_fb.c
+++ b/drivers/video/exynos_fb.c
@@ -63,6 +63,9 @@
 static void exynos_lcd_init(vidinfo_t *vid)
 {
 	exynos_fimd_lcd_init(vid);
+
+	/* Enable flushing after LCD writes if requested */
+	lcd_set_flush_dcache(1);
 }
 
 static void draw_logo(void)