Revert to RGB Underglow being enabled, rather than rgb matrix

keyboards/ergodox_ez/rules.mk

@@ -82,7 +82,7 @@ UNICODE_ENABLE   = yes # Unicode
 SWAP_HANDS_ENABLE= yes # Allow swapping hands of keyboard
 SLEEP_LED_ENABLE = no
 API_SYSEX_ENABLE = no
-RGBLIGHT_ENABLE = no
-RGB_MATRIX_ENABLE = yes
+RGBLIGHT_ENABLE = yes
+RGB_MATRIX_ENABLE = no // enable later
 
 LAYOUTS = ergodox