pxa168fb: fix offset setting at initialization

Signed-off-by: Jun Nie <njun@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/drivers/video/pxa168fb.c b/drivers/video/pxa168fb.c
index 84d8327..75285d3 100644
--- a/drivers/video/pxa168fb.c
+++ b/drivers/video/pxa168fb.c
@@ -687,6 +687,7 @@
 	}
 
 	info->fix.smem_start = (unsigned long)fbi->fb_start_dma;
+	set_graphics_start(info, 0, 0);
 
 	/*
 	 * Set video mode according to platform data.