ARM: dts: msm: Add support for modem test tools on msm8996 vplatform

Add smdpkt and glinkpkt devices with the SSR handlers to
support PC based tools to test the modem and adsp.

Change-Id: I2a77f6d01ad13b9c061eacbf4d08af12d8e183a7
Signed-off-by: Ramachandran Venkataramani <ramavenk@codeaurora.org>