staging: brcm80211: brcmfmac: Roamed channel info passed to cfg80211

With this patch, brcmfmac driver will pass roamed channel information to
cfg80211 via cfg80211_roamed() API.

Signed-off-by: Sukesh Srikakula <sukeshs@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>