I have the demo up and running just fine using the a10gx_daq2_2016_r1.zip
precompiled FPGA SOF and Linux OS sources.
I terms of the Linux kernel, I have successfully built 3 versions of the kernel per the instructions located on the Wiki:
I built the altera_4.0, altera_4.4 and altera_4.6 version as published on GitHub:
I have not been able to get any of my three kernel builds to boot up as the zImage in the zip file does. I get no network connectivity. The udhcpc client stalls out trying to obtain a DHCP issued IP address. Serial console output attached.