Revert "cpufreq: update the input even handler to handle sync cores correctly."

This reverts commit 749884de.

Hotplug stability issues have been observed with the original change
when booting will maxcpus set to be less than the total number
of available CPUs. Revert the change until the issue is resolved.

Change-Id: Id9a26693e23bff83dce638918525411ca02dfc3e
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>