Require /etc/sysfs.d to create governor.conf in it

Change-Id: I3fbc02a9073b88b71de2645057cc9bd2b2ff9d21
diff --git a/linux/system/cpu.sls b/linux/system/cpu.sls
index 8312c75..4bf6564 100644
--- a/linux/system/cpu.sls
+++ b/linux/system/cpu.sls
@@ -29,6 +29,8 @@
     - mode: 0644
     - defaults:
         governor: {{ system.cpu.governor }}
+    - require:
+      - file: /etc/sysfs.d
 
 {% for cpu_core in range(salt['grains.get']('num_cpus', 1)) %}