unfortunately wireless controllers are not supported on the MARS.
you can add the wireless device as a generic device, as long as it supports syslog events types on port 514. The
device will come up as a "unknown reporting", but you can use the custom parser to make the most critical messages appear on the reporting.
Given below is the url to add a generic device. It says generic router but is ok
http://cisco.com/en/US/products/ps6241/products_user_guide_chapter09186a008074f215.html#wp1189245