ACPI: docs: enumeration: Remove redundant .owner assignment

The owner member of the struct i2c_driver is assigned by a corresponding macro.
No need to assign it explicitly.

Fixes: 59c39878 ("ACPI: add documentation about ACPI 5 enumeration")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>