Look to see if it exists in /lib/modules/3.2rc5-architecture/kernel/drivers/staging/brcm80211/brcmsmac/. There should be a brcmsmac.ko file in there, this is the module, if not there, than you have to try again and include it. I have no successful kernel building experience.
EDIT: If the brcm80211 folder is missing, this is probably what you need to include in configuration.
Last edited by Brains; 12-12-2011 at 01:07 PM.