xf86-video-mga: Changes to 'my_fixes_done'

[Egbert Eich]

New branch 'my_fixes_done' available with the following commits:
commit 12af175fee1d3f6f17f8391ec642d904deca3783
Author: Egbert Eich <eich at freedesktop.org>
Date:   Tue Jun 7 19:31:16 2011 +0200

    Disable Linear Expansion on BE
    
    Linear Expansion doesn't work on BE as the bit order in
    a word is reversed. ScreenToScreenColorExpansion allows
    to adjust the bit order in a byte, still the bytes have
    the wrong order.
    
    Reviewed-by:  <wharms at bfs.de>
    Signed-off-by: Egbert Eich <eich at freedesktop.org>