ARM: dts: msm: Populate OPP table for GFX clock on MSM8909

For GPU thermal mitigation, there is need to populate OPP
table for gfx3d clock source so add support for the same.

Change-Id: I36b38f6c7a8a690e303cdf844f3b2a0d467117ed
Signed-off-by: Chinkit Kumar,Kirti Kumar Parmar <parma@codeaurora.org>