gbsim: Add support to receive messages on control endpoint
gbsim: Add support to receive messages on control endpoint

Gbsim needs to receive messages from the AP over control endpoint, like
cport count, cport reset, etc.

Add support for that.

Signed-off-by: Viresh Kumar <5ff32272b3d9f86512eddc8e0af523fc6f7924e5@linaro.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@google.com>

projectara/gbsim,projectara/gbsim,gregkh/gbsim,gregkh/gbsim