I am using the Morty branch of the i.MX Yocto BSP (imx-4.9.11-1.0.0_qa.xml) for the imx6ull-14x14-evk. I would like to implement a user space driver using uio_pdrv_genirq. It doesn't appear that that uio_pdrv_genirq is currently being built as part of the kernel. I've tried to modify defconfig is various directories to add this support with no luck. What is the correct/best way to enable this support?