pinctrl: aw9523: Drop explicit initialization of struct i2c_device_id::driver_data...

pinctrl: aw9523: Drop explicit initialization of struct i2c_device_id::driver_data to 0

These drivers don't use the driver_data member of struct i2c_device_id,
so don't explicitly initialize this member.

This prepares putting driver_data in an anonymous union which requires
either no initialization or named designators. But it's also a nice
cleanup on its own.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/20240920153430.503212-13-u.kleine-koenig@baylibre.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>