pci registers for nforce2

[jason]

#define    AGP_NVIDIA_3_APBASE        0x50
#define    AGP_NVIDIA_3_APLIMIT        0x54
These are only listed in agpreg.h and agp_nvidia.c, where as all other 
register information(as far as I can tell) is also listed in pcireg.h.  
Is it necessary to have it listed in both places or is it fine as is?  
If it is a custom register for the nforce2, I guess it would be ok but I 
don't know.
Thanks,
Jason