New Fedora 21 update to Kernel 3.17.7-300.fc21.x86_64 activated nouveau driver again

On my system, I have a NVidia Quadro FX 770 and therefore I'm using
the NVidia driver itself, since rpmfusion does not support my graphic anymore.

But the last update to kernel 3.17.7-300.fc21.x86_64 activated the free
nouveau driver, which sets a kernelmode. But this didn't let me install
the NVidia driver. So I blacklisted the nouveau driver, but it was also in
the initramdisk. So a
dracut --force

built a new one and after a reboot, I could install the NVidia driver again.