staging: brcm80211: use consistent naming for mac80211 callbacks

Most mac80211 callbacks were named using prefix 'wl_ops' except
for a few. These have been aligned to use the prefix as well.

Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: Brett Rudley <brudley@broadcom.com>
Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>