net: ipc_router: Disable using SMEM Logs by default

IPC Router logs the message summary into SMEM Logs, a centralized logging
framework by default. The usage of SMEM Logs from the context of SSR
framework is restricted, while some clients exchange messages in the
context of SSR framework.

Disable using SMEM logs from IPC Router by default and enable it only
when required.

CRs-Fixed: 906400
Change-Id: Id8612a4617793f3f896800c111f6b1402b1fae9e
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>