ARM: dts: msm: Adding simulator panel config for target msm8994

Added dual dsi simulator vidoe panel configs. The panel booted in this
mode need not have an actual panel attached.

Change-Id: Ib9c5f241b0bed6878fab5308667d66023e874718
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>