ipmi: 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.

While at it, also remove commas after the sentinel entries.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Message-Id: <20240708150914.18190-2-u.kleine-koenig@baylibre.com>
Signed-off-by: Corey Minyard <corey@minyard.net>