ARM: dts: msm: add physical dimensions for panels on SDM845

The physical dimensions are used to determine the DPI in the
framework. If these dimensions are not provided, the framework
assumes a default DPI value which may not be suitable for the
current panel and lead to some apps drawing incorrectly.
Add physical dimensions for all support panels on SDM845.

Change-Id: If0b553ea5d3e598b2eaadee03819f7892c0b0238
Signed-off-by: Vara Reddy <varar@codeaurora.org>