did you download the dell drivers? there are three, I have to assume the one you after is the top one as none mention Aetheros, and the bottom two are Intel. You cannot dl direct from Qualcomm so that didn't help.
this one: http://www.dell.com/support/home/us/en/04/Drivers/DriversDetails?driverId=0JJ8H&fileId=3492076410&osCode=WT64A&productCode=dell-venue-11i-pro&languageCode=en&categoryId=NI