We apologize for the inconvenience, but the driver offers no option to do so.
You can still enable the Anisotropic fliter on the driver. To do so Right Click the Desktop > Graphics Properties.
Then, select the 3D menu from the left column, and ensure that Custom Settings is Enabled.
Thank you for information.
Anyway, hope Intel will improve their driver to solve this problem in the future release.
Forcing AF filtering in the driver doesn't work as well in many many games. Only in a few it works.