[AGPGART] VIA AGPGARTs can support really small aperture sizes.

Signed-off-by: Dave Jones <davej@redhat.com>

drivers/char/agp/via-agp.c

@@ -93,6 +93,8 @@ static struct aper_size_info_8 via_generic_sizes[7] =
 	{16, 4096, 2, 240},
 	{8, 2048, 1, 248},
 	{4, 1024, 0, 252}
+	{2, 512, 0, 254}
+	{1, 256, 0, 255}
 };