staging: brcm80211: fixed checkpatch warnings for brcmutil dir

Most of them being 'line longer than 80 chars' type of warning.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>