Remove kas patches from meta-cassini-bsp
meta-cassini-bsp is about to be separated from meta-cassini.
However meta-cassini-bsp contains out-of-tree patches which kas applies when fetching upstream layers from other repositories. When meta-cassini-bsp is removed, these patches will not be found.
Before removing meta-cassini-bsp, move the out-of-layer patches to meta-cassini-config/kas
BSP-specific out-of-layer patches should be avoided as much as possible going forwards.