rootdir: fix path for read_ahead sysfs

Change-Id: Iec934e97a07e393d12806a3286e47b998f994ac2
diff --git a/prebuilt/etc/init.local.rc b/prebuilt/etc/init.local.rc
index 57c12ab..70a1860 100644
--- a/prebuilt/etc/init.local.rc
+++ b/prebuilt/etc/init.local.rc
@@ -66,13 +66,13 @@
     # I/O scheduler
     chown system system /sys/block/mmcblk0/queue/scheduler
     chmod 0664 /sys/block/mmcblk0/queue/scheduler
-    chown system system /sys/block/mmcblk0/bdi/read_ahead_kb
-    chmod 0664 /sys/block/mmcblk0/bdi/read_ahead_kb
+    chown system system /sys/block/mmcblk0/queue/read_ahead_kb
+    chmod 0664 /sys/block/mmcblk0/queue/read_ahead_kb
 
     chown system system /sys/block/mmcblk1/queue/scheduler
     chmod 0664 /sys/block/mmcblk1/queue/scheduler
-    chown system system /sys/block/mmcblk1/bdi/read_ahead_kb
-    chmod 0664 /sys/block/mmcblk1/bdi/read_ahead_kb
+    chown system system /sys/block/mmcblk1/queue/read_ahead_kb
+    chmod 0664 /sys/block/mmcblk1/queue/read_ahead_kb
 
     # allow system to modify ksm control files
     chown root system /sys/kernel/mm/ksm/pages_to_scan