ARM: dts: msm: add msm-id on rumi overlay for sdm855

msm-id is required for bootloader to match up the overlay
device tree blob. Add msm-id for rumi overlay file to enable
dtbo support.

Change-Id: I5dee8ea9c873e82585bf34b964430b7c27f5927a
Signed-off-by: Runmin Wang <runminw@codeaurora.org>