RE: Removing device driver code in mainboard.c for Tyan boards?

[YhLu]

chip northbridge/amd/amdk8                              
        device pci_domain 0 on                          
                device pci 18.0 on # LDT0       
.				....
    		  End
    		  ....
    		  chip northbridge/amd/amdk8

device pci 19.0 end
    			...
    		   End 
    	End # PCI domain
.....acpic...
End # NB K8

It looks strang, 
Why not thang that to followings?

device pci_domain 0 on                          
    chip northbridge/amd/amdk8                              
                device pci 18.0 on # LDT0       
.				....
    		  End
    		  ....
     End #NB K8
    		  chip northbridge/amd/amdk8

device pci 19.0 end
    			...
    		   End 
    	End # PCI domain
.....apic....