ARM: dts: msm: Increase VBP for jdi 1080p video mode panel

Currently the vertical back porch of this JDI 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: I2f7ce4f720fbf4a4a951aa159d79f302f13aac51
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>