brcmfmac: change function signatures

cfg80211 api change needs to be applied. this change will be squashed
with introducing commit:

commit 68751daec95b07a74b18aa22b2f9c196991dbe81
Author: Hante Meuleman <meuleman@broadcom.com>
Date:   Mon Nov 26 12:21:27 2012 +0100

    brcmfmac: add support for P2P listen mode.

Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>