Improve NVIDIA tools for auto-configuration (#9)

* nvidiactl: Strip trailing spaces

* nvidiactl: Remove blank line at end of file

* nvidiactl: Load nvidia-drm Linux kernel module

From `nvidia-drm-outputclass.conf` shipped by the NVIDIA Installer.

> This xorg.conf.d configuration snippet configures the X server to
> automatically load the nvidia X driver when it detects a device driven
> by the nvidia-drm.ko kernel module.  Please note that this only works
> on Linux kernels version 3.9 or higher with CONFIG_DRM enabled, and
> only if the nvidia-drm.ko kernel module is loaded before the X server
> is started.

Therefore load that Linux Kernel module so that the configuration works
automatically.

From Aaron Plattner in #nvidia@irc.freenode.net:

> 16:31 < aaronp> PaulePanter, by default, nvidia-drm.ko provides the X
>       auto-load behavior and also assists in wiring up PRIME
>       configurations to the integrated GPU's display.
> 16:31 < aaronp> If you load it with the 'modeset=1' parameter, then it
>       provides a complete drm driver that can be used by drm/eglstream
>       clients such as mutter or patched versions of weston.

nvidiactl/nvidia.service

@@ -10,4 +10,3 @@ StandardOutput=syslog
 
 [Install]
 WantedBy=graphical.target multi-user.target
-

nvidiactl/nvidiactl

@@ -21,7 +21,7 @@ pciids="${PCIIDHINT_DIR}/${kver}-${nvver} ${PCIIDHINT_DIR}/${nvver}"
 
 leglvl="current"
 
-for leglvlhint in ${pciids} ; do 
+for leglvlhint in ${pciids} ; do
     if [ -h "${leglvlhint}" ] ; then
         leglvl=$(readlink ${leglvlhint})
         break
@@ -66,10 +66,11 @@ if [ ! -z $N ]; then
   if [ -e ${leglink}/nvidia-uvm.ko ]; then
     insmod ${leglink}/nvidia-uvm.ko
     D=`grep nvidia-uvm /proc/devices | awk '{print $1}'`
-    if [ ! -z $D ]; then 
+    if [ ! -z $D ]; then
       mknod -m 666 /dev/nvidia-uvm c $D 0
     fi
   fi
   test -e  ${leglink}/nvidia-modeset.ko && insmod ${leglink}/nvidia-modeset.ko
+  test -e  ${leglink}/nvidia-drm.ko && insmod ${leglink}/nvidia-drm.ko
 fi
 exit 0