ARM: dts: msm: Update MSM8996 V3 CPU frequency plan

Characterization has now been completed and it is safe
to update the CPU frequency plan to list the maximum
frequencies.

Change-Id: I7a785930eb17047e1048fce533d71a97837f7023
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>