vga16fb: actually support widths in multiples of 8

vga16fb does not just support 8-pixel wide rectangles, but rectangles with
widths in multiples of 8.
Signed-off-by: NAntonino Daplas <adaplas@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/vga16fb.c

@@ -1378,8 +1378,8 @@ static int __init vga16fb_probe(struct platform_device *dev)
 	info->fbops = &vga16fb_ops;
 	info->var = vga16fb_defined;
 	info->fix = vga16fb_fix;
-	/* supports 8-pixel wide blit rectangles only */
-	info->pixmap.blit_x = 1 << (8 - 1);
+	/* supports rectangles with widths of multiples of 8 */
+	info->pixmap.blit_x = 1 << 7 | 1 << 15 | 1 << 23 | 1 << 31;
 	info->flags = FBINFO_FLAG_DEFAULT |
 		FBINFO_HWACCEL_YPAN;