clk: qcom: clock-cpu-8939: Add use_max_uV flag for all vdd_class

All CPU/CCI vdd_class share same regulator, but they have different
fmax levels. Set use_max_uV flag so that their voltage range request
don't conflict with eath other.

Change-Id: I4edbfa634ed9f14ded2bd859569090b448e17c9c
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>