[Keyboard] Convert ErgoDox EZ to Matrix Lite (#10189)

* Convert ErgoDox EZ to lite matrix

* Add initial config from Dactyl config

Based on ErinCall's work to generalize the mcp i/o expander matrix code

* formatting

* Fix number of pins

* Remove unused defines

keyboards/ergodox_ez/ergodox_ez.h

@@ -4,10 +4,6 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "i2c_master.h"
-#include <util/delay.h>
-
-#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
-#define CPU_16MHz       0x00
 
 // I2C aliases and register addresses (see "mcp23018.md")
 #define I2C_ADDR        0b0100000