ARCH: arm: dts: add msm-id for sdxpoorwills chipset

Add msm-id for automotive variant of sdxpoorwills in
device tree. Bootloader will match this value to the
value obtained from hardware to identify best matching
device tree for the given board.

Change-Id: Ie465722e6c358db2dc85612adf659015d17f9ada
Signed-off-by: Abinaya P <abinayap@codeaurora.org>