nvidia: fix make module

Signed-off-by: Philip J Perry <phil@elrepo.org>
nvidia: comment out options in modprobe.d/nvidia.conf

Disable these options by default and make this a user configuration
file.

Signed-off-by: Philip J Perry <phil@elrepo.org>
nvidia: add nvidia-modprobe and manpage

Signed-off-by: Philip J Perry <phil@elrepo.org>