ARM: dts: msm: add post init delay parameter to truly panels

Truly 1080p panels need one frame update before updating the
backlight. Add this post init parameter to truly panel nodes.

Change-Id: Icd495a5a98a068b5c47c9c25dfa3c0bda676c6f0
Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>