patch for mga driver to manage Matrox MGA G200 SE (ServerEngines)

Hello,

I've backported code from Xorg's mga driver in order to manage the Matrox 
MGA G200e SE (ServerEngines) video adapter,
which you can find, for example, onboard in recent Fujitsu-Siemens servers 
(RX200-S3, TX200-S3, TX150-S5).

This adapter doesn't support DRI, so backporting was quite 
straightforward.

PCI ID is 102b:0522

My patch (793 lines) applies on XFree86 4.6.99.17 (it should on previous 
versions) and I've tested it successfully.

Files modified by the patch :
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga.h
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_dacG.c
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_driver.c
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_macros.h
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_merge.c
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_reg.h
- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_storm.c

Since I think that posting an attachement to this mailing list is not 
supported, I can send
the patch to anyone requesting it.

Loïc / Toulouse / France