rootdir: Update cpufreq permissions when governor changes

 * Requires a kernel change to send the uevent.
 * This should alleviate some frustration that the performance/kernel
   folks have expressed regarding the Power HAL.

Change-Id: I31e6e13534159214a3b600082b7c0e4249433364

rootdir: Tighten permissions on boostpulse nodes

 * New PowerHAL code will only write to this as the system user, so
   remove the need for it to be world writable.

Change-Id: Ia9e69a6feff7c5ef1ff34a1180225e4008e8130f

rootdir: Set perms on interactive governor's min_sample_time

Change-Id: I75e9f424af731bdf1ca222eee2f4f18b20a6552b

rootdir: set perms on ondemand governor's up_threshold

Change-Id: I0a042a81be677821fa4099a3e19281d390dd27c3

Set permissions on io_is_busy node for interactive governor

Change-Id: I9dce40b0680fdb594f415aade22dbd92ebffa43c

rootdir: Set permissions for additional ondemand sysfs nodes

Change-Id: Id39cab7ab69ea8f67de99f5b4ee342e2c52ebedd

ueventd: Add rules for governors and cpufreq

This change requires a kernel patch in cpufreq to work.

Change-Id: I6281645291ca4516748f65d0799e14971c5fb2ea