vendor/cm: Clean up init.local.rc

These changes fix the error below found in a logcat and clean up some other issues in the file.

"E CM PowerHAL: Error opening /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate: Permission denied"

	PS2: tweaked permissions & removed dupilcated entries

Change-Id: I9b1bbe66c36ba0d8de13b8cb9351d2952851c250