i2c: i801: Simplify initialization of i2c_board_info in i801_probe_optional_slaves

Why shall we bother to open-code something that the compiler can do for us.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>