Staging: bcm: fixed a comment coding style issue

Fixed a C99 comment issue in InterfaceMisc.h.

Signed-off-by: Anh Le <anhlq2110@gmail.com>
Reviewed-by: Matthias Beyer <mail@beyermatthias.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>