[Core] Refactor OLED to allow easy addition of other types (#13454)

* add docs

* core changes

* update keyboards to new OLED

* updated users to new OLED

* update layouts to new OLED

* fixup docs

* drashna's suggestion

* fix up docs

* new keyboards with oled

* core split changes

* remaining keyboard files

* Fix The Helix keyboards oled options

* reflect develop

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: mtei <2170248+mtei@users.noreply.github.com>

keyboards/angel64/alpha/keymaps/default/keymap.c

@@ -37,7 +37,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
         KC_NO, KC_NO, KC_NO, _______, KC_NO, _______, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO),
 };
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 void oled_task_user(void) {
   oled_write_P(PSTR("Layer: "), false);
   switch (biton32(layer_state)) {

keyboards/angel64/rev1/keymaps/default/keymap.c

@@ -24,7 +24,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
         KC_LCTL, KC_LALT, KC_LGUI, KC_SPC, KC_SPC, KC_SPC, KC_SPC, KC_SPC, KC_RALT, KC_APP, KC_RCTL),
 };
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 void oled_task_user(void) {
   // Host Keyboard LED Status
   oled_write_P(IS_HOST_LED_ON(USB_LED_NUM_LOCK) ? PSTR("NUMLCK ") : PSTR("       "), false);

keyboards/angel64/rev1/keymaps/kakunpc/keymap.c

@@ -172,7 +172,7 @@ void matrix_scan_user(void) {
 #endif
 }
 
-#ifdef OLED_DRIVER_ENABLE
+#ifdef OLED_ENABLE
 void oled_task_user(void) {
   oled_write_P(PSTR("Layer: "), false);
   switch (biton32(layer_state)) {

keyboards/angel64/rules.mk

@@ -28,7 +28,8 @@ RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
-OLED_DRIVER_ENABLE = yes
+OLED_ENABLE = yes
+OLED_DRIVER = SSD1306
 CUSTOM_MATRIX = yes
 
 SRC += matrix.c