All drm modules are added to the first and second stages, except
for nouveau and nvidia. Nouveau is added to stage2. nvidia needs
to be added to live and the base system separately. This is an
auxiliary target.

See also https://bugzilla.altlinux.org/31971

This reverts commit c1e9fc6e.

ancient - drm modules for very old graphics cards.
Only needed for some retro builds.

Kernel modules of the proprietary Nvidia driver should not included
to initrd.

The drm feature solves the problem of creating a common entry
point for adding kernel drm modules for different package lists.
The need for allocation into a separate feature arose from one
parties to the need to make a switch between free and proprietary
NVIDIA driver, on the other, because of the need to add only drm
modules kernels for purposes such as use/stage2/kms and use/plymouth.

Also no more switch needed for RADEON, as only the free video driver
remains.