ARM: dts: msm: Change chipid and GFX clock settings for msm8996v3

Override msm8996 chipid and clock settings with new values
for msm8996v3.

Change-Id: I5e8f4372f5be6d6d7191b2718e69bc2b1bcc3e6b
Signed-off-by: Suman Tatiraju <sumant@codeaurora.org>