msm: ipc: Set unsupported protocol operations to default operations

Some of the socket system calls do not check the validity of the
operations supported by the protocol. This in turn leads to NULL
pointer dereferences.

Set the operations that are not supported by IPC Router to default
operations.

CRs-Fixed: 573295
Change-Id: Iba94b1403fa84dbe712255cc10677e9ef0848100
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>