net: ipc_router: Add support for connect system call

Enable support for connect system call, so that the destination address is
stored as part of the port. Subsequently the clients of IPC Router can use
send and recv system calls in addition to sendto and recvfrom.

Reset any connection between the local port and remote port if the remote
port exits either voluntarily or due to subsystem restart.

Change-Id: Icf45934a1fc9d01ff96f2a7a47359b66ac22ccbd
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>