Staging: winbond: Changed c99 comments to c89 comments

checkpatch cleanup: Changed c99 comments to c89 comments

Signed-off-by: Harsh Kumar <harsh1kumar@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>