msm: cpufreq: Remove acpuclock calls from cpufreq

msm-cpufreq has moved to use generic clock APIs for getting and
setting clock frequency. Remove the usage of deprecated acpuclock
APIs.

Change-Id: Ia05a86a58e031a3ec4ea59cb00fba1c33cddc78b
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>