So using the settings suggested by philbot999, I get a lot more success until I reach:
Verifying filesystem skeleton...
ERROR ~/Design/Renesas/RZ_Not_XIP/Wilink/build-utilites/fs/lib/modules/3.14.*/updates/drivers/net/wireless/ti/wl18xx/wl18xx.ko Not found !
While I don't see any errors until this point, it looks as though the driver isn't being built.
I thought perhaps the kernel needs patching, however none of the kernel patches provided seem like they will do the trick. The closest kernel version looks like it is specific to an imx architecture.
I'm sure I'm missing something simple, any insight would be greatly appreciated!