greybus: svc: fully initialize the partially initialized connection

SVC hello message is received now and we should fully initialize the
partially initialized connection. This can be done by removing and
re-adding the device corresponding to the connection.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Perry Hung <perry@leaflabs.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>