The configuration summary prints a line with "vhost-user: YES/NO",
but the value is currently the vhost-kernel setting instead which
looks wrong. Print the kernel setting in a separate line and switch
the "vhost-user:" line to CONFIG_VHOST_USER instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201109085906.87921-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>