Add via support to keebio/bdn9 (#8620)

Signed-off-by: Joshua Rubin <me@jawa.dev>

keyboards/keebio/bdn9/keymaps/via/keymap.c

@@ -0,0 +1,52 @@
+#include QMK_KEYBOARD_H
+
+enum layer_names {
+  _ZERO,
+  _ONE,
+  _TWO,
+  _THREE
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+[_ZERO] = LAYOUT(
+    KC_MPLY, KC_HOME, KC_MUTE,
+    MO(1),   KC_UP,   RGB_MOD,
+    KC_LEFT, KC_DOWN, KC_RGHT
+),
+
+[_ONE] = LAYOUT(
+    RESET,   BL_STEP, KC_STOP,
+    _______, KC_HOME, RGB_MOD,
+    KC_MPRV, KC_END , KC_MNXT
+),
+
+[_TWO] = LAYOUT(
+    _______, _______, _______,
+    _______, _______, _______,
+    _______, _______, _______
+),
+
+[_THREE] = LAYOUT(
+    _______, _______, _______,
+    _______, _______, _______,
+    _______, _______, _______
+)
+
+};
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+    if (index == 0) {
+        if (clockwise) {
+            tap_code(KC_VOLU);
+        } else {
+            tap_code(KC_VOLD);
+        }
+    } else if (index == 1) {
+        if (clockwise) {
+            tap_code(KC_WH_U);
+        } else {
+            tap_code(KC_WH_D);
+        }
+    }
+}

keyboards/keebio/bdn9/keymaps/via/rules.mk

@@ -0,0 +1,5 @@
+VIA_ENABLE = yes
+LINK_TIME_OPTIMIZATION_ENABLE = yes
+MOUSEKEY_ENABLE = yes
+CONSOLE_ENABLE = no
+COMMAND_ENABLE = no