callers's -> caller's
Install agp_* drivers where pchb(4) is installed except INSTALL_FLOPPY.

XXX
Config around agp(4) is done in quite wrong direction.
	"pchb <- (agpbus) <- agp <- agp_*"
should be:
	"pchb <- (pcibus) <- agp_* <- (agpbus) <- agp"