ARM: dts: msm: Add G-Link SSR device nodes for sdm670

SSR device nodes contain the list of subsystems to notify when an SSR for a
given subsystem occurs. This information enables G-Link to handle closing
and re-opening channels in the case of SSR.

CRs-Fixed: 2059063
Change-Id: I1205e590384c34caae735034be5c0a444be94279
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>