shorthair: Add ddccontrol service

Change-Id: If3548af3c7cfd414bbfc9b5f042aeb9627326b1c
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/572
Tested-by: Samuel Shuert <coded@clicks.codes>
Reviewed-by: Skyler Grey <minion@clicks.codes>
diff --git a/systems/x86_64-linux/shorthair/backlight/default.nix b/systems/x86_64-linux/shorthair/backlight/default.nix
new file mode 100644
index 0000000..186a5aa
--- /dev/null
+++ b/systems/x86_64-linux/shorthair/backlight/default.nix
@@ -0,0 +1,3 @@
+{
+  services.ddccontrol.enable = true;
+}
\ No newline at end of file