hwmon: Drop unused i2c driver_data

hwmon: Drop unused i2c driver_data

The four drivers all don't make use of the value that was explicitly
assigned to the .driver_data member. Drop the assignment.

While touching these lines also make the assignments use named
initializers and drop a comma after the end-of-list marker.

Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz> # For
Link: https://lore.kernel.org/r/e8ceb3931975813545a8b478cc1a71b4ede9a6c0.1778688803.git.u.kleine-koenig@baylibre.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>