cpufreq: interactive: Revert sync freq feature

Sync freq feature is not valid for a HMP system with clusters.

This commit reverts commit f3d1980b
(cpufreq: interactive: sync freq feature for interactive governor)

Change-Id: I78cb91a94b1a022f8daed045f5aae69f1c00783d
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>