Revert "vsock: each transport cycles only on its own sockets"

This reverts commit d9fe5909 which is
commit 8e6ed963 upstream.

It breaks the kernel abi and this is not an issue for Android systems,
so it can be safely reverted.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ib08050fa5ac86f1337ae7c1a05c846393d6cc455