Revert "ARM: dts: msm: Add cmd mode panel support for SDM660 MTP"

This reverts commit 2fabceda
as this was causing bootup failure due to 'timing' subnode
not being present.

Change-Id: I7a65c0436d6e71c2637f55bb1161c299735abaa8
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>