clk: qcom: clock-cpu-8994: Rework the cpu clock round rate function

In order to return only the frequencies supported in the voltage
plan (since CPR parameters are optimized for those frequencies),
use the fmax table in the CPU clock structure to return supported
frequencies from the round_rate op. This also provide a slight
speed benefit while selecting frequencies before a set_rate.

Sneak in a formatting fix (a newline) that makes kernel log
look less ugly.

Change-Id: I2da2efc1a28bc1159faaa0434895c7efb30ffc60
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>