platform: msm-geni-se: Correct unit for ICC optimization

In older kernel target we had ICB and it use to take input
in BCM units for QUP core path, whereas in recent kernel we
have ICC for BW NOC voting and it accept input in KHz.

So correct unit for ICC optimization code.

Change-Id: Ia6c88dbd328dad1ff96c6c7ffd22c93db942d509
Signed-off-by: Akash Asthana <akashast@codeaurora.org>