msm: clock-a7: Correct cpu clock reference count

The msm cpufreq driver requires that the reference count be 1 for devices
that have multiple cpus sharing the same clock.

Change-Id: I3f0e0121780f0365e04e3823e203f0cc85e838f5
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>