The Makefile for drivers looks for an exfat directory under drivers.
There is no such directory, so I just commented it out in the Makefile.

Change-Id: Ia64094b65966899f3106c17cc40c1fc9ed3bb705
Merge pull request #2 from vorpalblade77/4.4.2

The Makefile for drivers looks for an exfat directory under drivers.