Keyboard: add ergoinu keyboard (#3655)

* add ergoinu

* remove unnecessary code

* replace include guard
delete unused code

* remove unused RGBLED defines

1 files changed, 12 insertions, 0 deletions

diff --git a/keyboards/ergoinu/split_util.h b/keyboards/ergoinu/split_util.h
new file mode 100644
index 0000000000..11cfd5455a
--- /dev/null
+++ b/keyboards/ergoinu/split_util.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <stdbool.h>
+#include "eeconfig.h"
+
+extern volatile bool isLeftHand;
+
+// slave version of matix scan, defined in matrix.c
+void matrix_slave_scan(void);
+
+void split_keyboard_setup(void);
+bool has_usb(void);