qcom-cpufreq: Support parsing different freq tables for each CPU clock

If CPUs have different performance characteristics, it makes sense to have
different CPU frequency tables for each unique CPU clock. Add support for
parsing different frequency tables for each unique CPU clock.

Change-Id: Ia9b064dfd1f84320d26dd41070339cec548abe7c
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>