Remove stale patch for systemd.

A workaround for this bug was added to the main buildroot tree in 55ad3cfd3f98
This workaround conflicts with the workaround added to the rpi-buildroot tree.
Merge pull request #9 from phire/fix-systemd

Remove stale patch for systemd.
Bump kernel version, rpi-userland and rpi-firmware
Merge pull request #3 from gamaral/rpi

Merge pull