drivers: soc: Add transport info when APR opens a channel

The transport "smd_trans" is required if far end is running SMD
instead of Glink. If far end is already running Glink, this property
is ignored in Glink layer and communication will be through Glink.

CRs-fixed: 986398
Change-Id: I76b59a9782ab77e1ee3b37afb1db6ec01340ea33
Signed-off-by: Deven Patel <cdevenp@codeaurora.org>