Add missing device ID for mid-2013 Macbook Air 6,1

I recently got a new mid-2013 Macbook Air, which seems to use a device ID that is missing from the kernel. From lsusb: Bus 001 Device 003: ID 05ac:0290 Apple, Inc. This generation of Macbook Air already has three IDs listed in the kernel (0x0291, 0x0292 and 0x0293) as WELLSPRING8, so I've added

Add missing device ID for mid-2013 Macbook Air 6,1

I recently got a new mid-2013 Macbook Air, which seems to use a device ID that is missing from the kernel. From lsusb: Bus 001 Device 003: ID 05ac:0290 Apple, Inc. This generation of Macbook Air already has three IDs listed in the kernel (0x0291, 0x0292 and 0x0293) as WELLSPRING8, so I've added