Added physical layouts for the following variants of numpads:
- With and without extra top row
- 2U plus key or 1U plus and backspace keys
- 2U 0 key or 1U 0 and 00 keys
- Full 1U grid/macropad layout
Other layouts exist, such as "southpaw" horizontally mirrored layouts,
and layouts with a fifth column, but those seem to be much less common.
Removed the combined .dtsi file for each group of common layouts, and
split the position map across the files in each group. This makes
reading the position maps slightly more difficult, but it aligns the
common layouts with the keyboard-specific ones such as
foostan/corne.dtsi in that simply including each header adds the
layout, with no need to set status = "okay".
pabile
Joel Spadin
Pete Johanson
ReFil