Staging: brcm80211: remove typedefs.h

It's not needed anymore, so remove it and clean up the .h inclusion mess
a bit to get everything to build properly again.

Wow, this needs some unwinding...

Cc: Brett Rudley <brudley@broadcom.com>
Cc: Henry Ptasinski <henryp@broadcom.com>
Cc: Nohee Ko <noheek@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>