My Planck rev 6.1 would not register any keys without "col2row".
I also had to apply a matrix_transform in order to move them to the
correct position. Peeking into #228 helped for finding this.
I also add transforms for the 2u spacebar layouts.
* Basic Clueboard Californai Macropad shield definition.
* New "direct" KSCAN driver that supports non-matrix direct
wiring for switches, needed for macropad that doesn't have
a matrix at all.
* Some renames for existing KSCAN GPIO driver to make the implied
"matrix" part explicit.
