VSOCK: Fix init_tables() compilation

Fat fingers pasted a void where it doesn't belong.  Also remove a decl that
isn't necessary.

Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Andy King <acking@vmware.com>
VMCI: Fix broken context ID retrieval

I'm an idiot.  The context ID can be a really large unsigned number, which
means it'll appear negative as an int.  So actually the right fix here is just
to set it regardless of the returned value (but only for this particular
hypercall; normally we would check it).

Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Andy King <acking@vmware.com>
VSOCK: Request upstream VMCI module

We should request VMCI using the upstream name, not the legacy Tools name.

Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Andy King <acking@vmware.com>