Add CONFIG_FHANDLE to kernel in order to fix the boot process.
It was broken by the libudev maintainers with this commit:
http://cgit.freedesktop.org/systemd/systemd/commit/src/libudev/libudev-monitor.c?id=df32a1caafe881fc7850a9b569179b877198685f
That added a dependency on the _optional_ name_to_handle_at() syscall. :-(
Pointy hat to: Lennart P.