* add temporary pdhelix(Patched Helix) code
* add test code into quantum/split_common/matrix.c
* add test code into keyboards/handwired/pdhelix/
* Revert "add test code into keyboards/handwired/pdhelix/"
This reverts commit 9ed98f0797.
* Revert "add test code into quantum/split_common/matrix.c"
This reverts commit 1876d3ed69.
* Revert "add temporary pdhelix(Patched Helix) code"
This reverts commit 41ac92b814.
* fix quantum/split_common/matrix.c: select_col()/select_row()