staging: brcm80211: got rid of static function declarations in softmac phy

Code cleanup. Reshuffled functions so that the declarations were not necessary
anymore.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>