buildroot

package/nvidia-driver: add option to install CUDA MPS server

Using CUDA with NVidia requires those two programs if one wants to use
more than one program doing CUDA at the same time.

This is only available on x86_64.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Al West <al.west@v-nova.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>