dlx: ueventd.rc: Remove duplication and fix cpufreq uevents

The cpufreq uevent definitions in the master ueventd.rc are correct.
I'm not sure why this was overriding them.  Let the master
ueventd.rc take care of this for us.

Also removed a couple of redundant entries that duplicate entries
in the master ueventd.rc.

Change-Id: I464f6b883edbe042ae323a40f59bc4425c7e05b2