esoc: add support for additonal physical link info

Some of the device configurations support multiple external SOCs.
To differentiate physical links, add support for additonal info
about the physical link.

CRs-Fixed: 2024578
Change-Id: If71bf23d798f8bf0b6594a686415fe9b806e4226
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>