agp_i810 not built on amd64?

I have a desktop with i945GMS builtin video.  It appears agp_i810.c is
not built on amd64, hence no support for agp.  This is on 6.x.

none0_at_pci0:2:0: class=0x030000 card=0x31031565 chip=0x27728086 rev=0x02
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Integrated Graphics Controller'
    class      = display
    subclass   = VGA

sys/conf/files.i386:pci/agp_i810.c                     optional agp

$ ls /sys/amd64/compile/SMP/*agp*
/sys/amd64/compile/SMP/agp.o            /sys/amd64/compile/SMP/agp_if.h
/sys/amd64/compile/SMP/agp_amd64.o      /sys/amd64/compile/SMP/agp_if.o
/sys/amd64/compile/SMP/agp_if.c         /sys/amd64/compile/SMP/agp_intel.o

Is there any reason not to use i810 on amd64?  A quick glance through
doesn't show it doing anything 32-bit specific.  On -current, it appears
to be enabled for amd64.  It appears this MFC never happened:

revision 1.93
date: 2006/09/05 16:55:12;  author: anholt;  state: Exp;  lines: +1 -0
Include agp_i810.c in amd64 AGP builds to get support for the Intel 915
Express chipsets.

PR:             kern/93676
Submitted by:   Jan Blaha <Jan.Blaha_at_unet.cz>
MFC after:      1 week


-- 
Nate