ARM: dt: msm8926v2: Match clockplan frequencies

GPU turbo frequency and BIMC frequencies have changed in v2.
Modify the dtsi file to match v2 and update the GPU clock plan
there.

Change-Id: I5ec79f4faac83d524c393765cec6950f71a1fbf4
CRs-fixed: 605171
Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>