QMK Firmware

Fix up RGB Matrix code

This commit fixes up some of the code, and expands the functionality of the RGB Matrix code. Including adding support for running RGB Light and RGB Matrix at the same time.

Specifically, this commit does this:

• Adds rgb_matrix_* functions, separate from the rgblight_* functions
  • Adds defines so that if rgblight is not enabled, it uses the rgb_matrix_* functions
  • This allows for both features to be used separately and independantly, though does not add keycodes for them.
• Adds *_noeeprom versions of the rgb_matrix_* functions, so it does not write to EEPROM
• Sets increment and decrement as static functions, so they can coexist in different files without compiler errors occurring.