net: qrtr: Add socket mode optimization

A remote endpoint should not need to know when a client socket is freed
if the socket never established commnication with the endpoint. Add a
mode to keep track of which endpoints a socket communicates with.

There are three modes a socket can be in:
	INIT   - Socket has not sent anything or only local messages,
		 only send client close to local services.

	SINGLE - Socket has sent messages to a single ept, send event
		 to this single ept.

	MULTI  - Socket has sent messages to multiple epts, broadcast
		 release of this socket.

Server state changes should be broadcast throughout the system. Change
the ipc state of a port when it sends a NEW SERVER control packet. This
ensures the DEL CLIENT control packet is propagated correctly for
servers.

This change squashes the following commits from msm-4.14:
  commit 3373eb77cd6d ("net: qrtr: Add socket mode optimization")
  commit d984a2d6f150 ("net: qrtr: Make servers multi state ports")

In addition, fix minor format issues.

Change-Id: I416742cff598bf7aa9da2baa2e86a53b18367870
Signed-off-by: Chris Lew <clew@codeaurora.org>