ARM: dts: msm: Fix wdsp glink node for sm8150

WDSP does not have a remote pid assigned to it because it is not a smem
based processor. Remove the fake value since the remote pid is not
required anymore. Add the label and glink label tags so glink register
returns successfully.

Change-Id: I35a08893d5fa90a818608d1b5e7c8fa082787889
Signed-off-by: Chris Lew <clew@codeaurora.org>