ARM: dts: msm: set the ST as default panel sdmmagpie

Checking the default TP.

If compatible is match to dtsi default string, this driver will
probe, otherwise, exit directly.

Change-Id: Ib5149a598294d46e17ede45dbb1d16b61d6dd651
Signed-off-by: jingming <jingming@codeaurora.org>