Hmm,well we are using that on all our roms,and the wifi is not working. On my builds i was getting "Unable to load (start) wifi driver",or something like that. When i asked for help on #cyanogenmod-dev i got an answer from on of they guys who had the same problem to use wpa_supp. 8 from other source. Can't remember wich one as i don't have my pc here. But it didn't work with it,mybe i did something wrong.
When I worked on JB, I recompiled ics rom with this configuration just to check that wifi is working or not. It worked, so I used this for JB too with the same calibration file and with the same configuration in ramdisk, but it didn't work. I have no idea that why.