[syslinux] HDT: Doesn't work with syslinux

[Erwan]

Sebastian Herbszt wrote:
> get_disk_params() from hdt-ata.c checks for INT 13h extension support and
> sets disk_info[disk].ebios accordingly. INT 13h AH=48h is later called
> unconditionally tho. Maybe call it only if the extension is supported.
>
AH=48 is only called if AH=0x8 was successfull as we do a return if it 
had failed.
Maybe we have to check if cbios is set to 1 to continue.