msm: acpuclock-cortex: Fix off by one error for large frequency tables

If a frequency table was greater than a certain size, data will be written
past the end of an array. Fix the loop conditions to prevent this.

CRs-fixed: 561651
Change-Id: If7bafcf79c044877f4a29c2437c139d23aa1fb32
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>