nForce ide, one more time: merged into amd74xx
Checking a bit more carefully, the 2.4.21-rc2 does still have an NVidia nForce
IDE tuning driver. But it's now part of another module:
CONFIG_BLK_DEV_AMD74XX, or amd74xx.o.
"make *config" lists it as "AMD and nVidia IDE support". So all's well, as far as I can tell.