drivers: w1: style corrections for parenthesis and braces

Inserted whitespace between command and open parenthesis
at two locations. Removed new line between open brace and
command/declaration at two locations.

Signed-off-by: Ben Werbowyj <ben.werbowyj@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>