Add 'cake' qdisc kernel module package.

V2 - KDB Small update to base on latest cake tc changes (wash option
deprecated)
V3 - KDB Move kmod-sched-cake package to kernel as is kernel related
V4 - KDB Split into individual patches, kmod & tc

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
Acked-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>