ARM: dts: msm: include supported panels for msm8226

Include all the supported panels for msm8226 in a
separate devicetree file which enables
access to all the supported panel nodes from
dsi controller. This allows implementation
of panel detection.

Change-Id: I9f79e8de00f9fee2e9a5706e3c166cf2928e8b40
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>