ARM: dts: msm: Update video clock config for sm8150

Video clock config is updated with following changes:
1. Removal of iris ahb clock, since this is enabled by default
2. Removal of 200MHz as this is not supported by display & gpu

CRs-Fixed: 2223586
Change-Id: I3cb470edfe9f2d8a1f8fd0cfb1d8d5d38ea6729a
Signed-off-by: Shivendra Kakrania <shiven@codeaurora.org>