[Keymap] clean up helix:five_rows keymap (#10866)

* Makes the OLED driver used by the helix:five_rows keymap switchable.

* use TOP/drivers/oled/oled_driver.c
  `make HELIX=stdole helix:five_rows`
* use helix/local_drivers/ssd1306.c
  `make HELIX=oled helix:five_rows`

* Separated the OLED related code from keymap.c and moved it to oled_display.c.

* scan rate without OLED
  * make HELIX=verbose,dispoff,scan helix/rev2:five_rows
    use Helix original code
    text   data    bss    dec    hex   filename
    18880    58    235  19173   4ae5   .build/helix_rev2_five_rows.elf
    matrix scan frequency: 1590

  * make HELIX=verbose,dispoff,scan,sc helix/rev2:five_rows
    use split_common code
    text   data    bss    dec    hex   filename
    18554    40    231  18825   4989   .build/helix_rev2_five_rows.elf
    matrix scan frequency: 1202

* scan rate with helix/local_drivers/ssd1306.c
  * make HELIX=verbose,dispoff,scan,oled helix/rev2:five_rows
    use Helix original code
    text   data    bss    dec    hex   filename
    24048   196    342  24586   600a   .build/helix_rev2_five_rows.elf
    matrix scan frequency: 739

  * make HELIX=verbose,dispoff,scan,sc,oled helix/rev2:five_rows
    use split_common code
    text   data    bss    dec    hex   filename
    23750   176    338  24264   5ec8   .build/helix_rev2_five_rows.elf
    matrix scan frequency: 642

* scan rate with drivers/oled/oled_driver.c
  * make HELIX=verbose,dispoff,scan,stdole helix/rev2:five_rows
    use Helix original code
    text   data    bss    dec    hex   filename
    24590   210    798  25598   63fe   .build/helix_rev2_five_rows.elf
    matrix scan frequency: 293

  * make HELIX=verbose,dispoff,scan,sc,stdole helix/rev2:five_rows
    use split_common code
    text   data    bss    dec    hex   filename
    24290   190    794  25274   62ba   .build/helix_rev2_five_rows.elf
    matrix scan frequency: 277

* clean up helix/rev2/keymaps/five_rows/keymap.c

* update five_rows/oled_display.c

* update helix/rev2/keymaps/five_rows/keymap.c: remove LAYOUT_kc()

* Ported the keymap from helix/rev2:five_rows to helix/rev3_5rows:five_rows.

* update five_rows/oled_display.c

* add License comment

1 files changed, 26 insertions, 0 deletions

diff --git a/keyboards/helix/rev2/keymaps/five_rows/layer_number.h b/keyboards/helix/rev2/keymaps/five_rows/layer_number.h
new file mode 100644
index 0000000000..1272feba4f
--- /dev/null
+++ b/keyboards/helix/rev2/keymaps/five_rows/layer_number.h
@@ -0,0 +1,26 @@
+#pragma once
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+enum layer_number {
+    _QWERTY = 0,
+    _COLEMAK,
+    _DVORAK,
+    _EUCALYN,
+    _KEYPAD,
+    _AUX,
+    _KAUX,
+    _LOWER,
+    _RAISE,
+    _PADFUNC,
+    _ADJUST,
+};
+
+#if defined(SSD1306OLED)
+extern void init_helix_oled(void);
+#   define INIT_HELIX_OLED() init_helix_oled();
+#else
+#   define INIT_HELIX_OLED()
+#endif