nvidia-utils: Enable required systemd services
Now, that we are enabling PreserveVideoMemoryAllocations !14 (merged) , which fixes the sleep behavior, we should also enable the nvidia services out of the box.
This adds a check, if these services are already running to avoid GPU resets, when enabling these, when they are already running. Therefore I have not used the --now function, since this is generally not required. The user should reboot after a nvidia-utils update anyways.
Signed-off-by: Peter Jung ptr1337@archlinux.org