Make digital rain RGB matrix effect #define configurable.

Fix YMDK NP21 keyboard to use proper keyboard level functions (qmk#3042)

* Use proper function levels

* Add matrix init functions

* Convert KEYMAP to LAYOUT

Or @mechmerlin is going to hunt me down and harm me... probably :)

* Fix conflict issues

RAMA M6-B and IS31FL3218 driver (qmk#4021)

* Initial RAMA M6-B commit.

* Moved IS31FL3218 driver, minor cleanups

* Refactor, added dynamic keymap.

* Added dynamic keymaps to RAMA M6-A

* Refactor M6-A and M6-B to use common code.

* Formatting

* Cleanup

* Cleanup

* Changes from review

CTRL keyboard bootloader_jump support

Adds support for CTRL keyboards to enter bootloader via bootloader_jump()

RAMA U80-A, wilba.tech WT60-A, WT65-A, WT80-A, IS31FL3736 driver (qmk…

…#3925)

* Initial commit of RAMA U80-A

* Initial commit of RAMA U80-A

* Moved IS31FL3736 driver, minor cleanups

* Superficial stuff

* Review changes

* Refactored to use common code.

RAMA U80-A, wilba.tech WT60-A, WT65-A, WT80-A, IS31FL3736 driver (qmk…

…#3925)

* Initial commit of RAMA U80-A

* Initial commit of RAMA U80-A

* Moved IS31FL3736 driver, minor cleanups

* Superficial stuff

* Review changes

* Refactored to use common code.

Moves animation calculation logic out of the for loops

Add new RGB matrix effect digital rain aka The Matrix

Pin avr-gcc in shell.nix pending release of 8.3.0 (qmk#3922)

* Pin avr-gcc in shell.nix pending release of 8.3.0

There's apparently a critical bug in 8.2.0, which is now the nixpkgs default. This change overrides that default in favor of the known good version. Once 8.3.0 is the default, the override can be dropped.

* Arch/Manjaro fix

Add On/Off keycodes