ARM: dts: msm: Remove unused dsi-v2-panel dtsi files

dsi-v2-panel were used for 8x10 with panel_v2 driver.
With panel v2 driver support removal these dtsi files
contains the dead code. 8x10 has already switch to
panel utility API.

Change-Id: I07f2f91c2fc4b38b546fc4defc95a55f284abb7c
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>