[SeaBIOS] [patch] Add IDE_TO_AHCI config

[Chuang, Alex]

Hi,

I add one config 'IDE_TO_AHCI' in 'src\Kconfig' and modify 'src\ata.c'.
Please help me to review and check-in.

This 'IDE_TO_AHCI' function can let SeaBIOS handle AHCI controller as
IDE controller when 'ATA' enable, and also let Windows OS to load AHCI
inbox driver or chipset vender's AHCI driver. In other words, it means
that SATA Hard Disk ran as IDE mode in SeaBIOS but AHCI mode in Windows
OS.

Attached file:   A.patch  B.patch.

Signed-off-by: Alex Chuang

Best regards,

Alex