ARM: dts: msm: Increase VBP for sharp 2k video mode panel

Currently the vertical back porch of this sharp panel is low
and causes performance related issues,hence increase the vbp of
this panel by making sure that no artifacts are observed on the
panel.

Change-Id: I0ed9d0673293eac9ec54c87c91569b8d63754e19
Signed-off-by: Anusha Koduru <kanusha@codeaurora.org>