arm/dt: SAMARIUM: Add initial device tree for MSMSAMARIUM

Add the DTSI file for the MSMSAMARIUM SoC as well as a DTS file
for the MSMSAMARIUM SIM platform. Also update makefile for
compiling dts file.

Change-Id: I8b7f07143c51b34ba93bfb4af6f360cc260f2f04
Signed-off-by: Jay Chokshi <jchokshi@codeaurora.org>