hikey: Fix stune path, as it changed with N

In N the stune cgroup is mounted under /dev/stune
instead of /sys/fs/cgroup/stune, so update the
path names.

Change-Id: Ic70da960e0d0ddd7a2286ecbfa074283bd36e921
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/init.hikey.rc b/init.hikey.rc
index ccb8824..a009792 100644
--- a/init.hikey.rc
+++ b/init.hikey.rc
@@ -66,10 +66,10 @@
     #
     # EAS stune boosting interfaces
     #
-    chown system system /sys/fs/cgroup/stune/foreground/schedtune.boost
-    chown system system /sys/fs/cgroup/stune/schedtune.boost
-    write /sys/fs/cgroup/stune/foreground/schedtune.boost 10
-    write /sys/fs/cgroup/stune/schedtune.boost 0
+    chown system system /dev/stune/foreground/schedtune.boost
+    chown system system /dev/stune/schedtune.boost
+    write /dev/stune/foreground/schedtune.boost 10
+    write /dev/stune/schedtune.boost 0
 
 
 # enable Google-specific location features,
diff --git a/power/power_hikey.c b/power/power_hikey.c
index 2dfe76d..158d732 100644
--- a/power/power_hikey.c
+++ b/power/power_hikey.c
@@ -36,7 +36,7 @@
 #include <hardware/hardware.h>
 #include <hardware/power.h>
 
-#define SCHEDTUNE_BOOST_PATH "/sys/fs/cgroup/stune/foreground/schedtune.boost"
+#define SCHEDTUNE_BOOST_PATH "/dev/stune/foreground/schedtune.boost"
 #define SCHEDTUNE_BOOST_NORM "10"
 #define SCHEDTUNE_BOOST_INTERACTIVE "40"
 #define SCHEDTUNE_BOOST_TIME_NS 1000000000LL