powerpc/476: Drop explicit initialization of struct i2c_device_id::driver_data to 0

This driver doesn'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>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240804112032.3628645-2-u.kleine-koenig@baylibre.com

arch/powerpc/platforms/44x/ppc476.c

@@ -95,7 +95,7 @@ static int avr_probe(struct i2c_client *client)
 }
 
 static const struct i2c_device_id avr_id[] = {
-	{ "akebono-avr", 0 },
+	{ "akebono-avr" },
 	{ }
 };