xf86-video-mga: Changes to 'refs/tags/xf86-video-mga-1.4.6'

[Daniel Stone]

Rebased ref, commits from common ancestor:
commit 74d21b74774c81d3d96ff3017763c25e3660dde0
Author: Daniel Stone <daniel at fooishbar.org>
Date:   Sun Dec 24 06:23:43 2006 +0200

    bump to 1.4.6