greybus: raw: Use consistent label names in connection_init()

Some of the labels are named based on what they are going to undo, while
others are based on where we failed in connection_init().

Follow only the first type of naming.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>