At least one revision of the AAO reports a 190x110mm maximum size but a
451x113mm mode.
X.Org Bug 41141 <https://bugs.freedesktop.org/show_bug.cgi?id=41141>
Signed-off-by: Ross Burton <ross@linux.intel.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>