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>

drivers/net/wireless/brcm80211/brcmfmac/p2p.c

@@ -982,9 +982,9 @@ int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
 
 	memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
 	*cookie = p2p->remain_on_channel_cookie;
+	cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 
 exit:
-	cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 	return err;
 }