[Keyboard] Convert ergoinu to SPLIT_KEYBOARD (#15305)

keyboards/dm9records/ergoinu/config.h

@@ -20,7 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #include "config_common.h"
-#include "serial_config.h"
 
 /* USB Device descriptor parameter
    VID & PID are lisenced from microchip sublisence program, Don't use other project! */
@@ -30,11 +29,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MANUFACTURER    Dm9Records
 #define PRODUCT         ergoinu
 
-#define TAPPING_FORCE_HOLD
-#define TAPPING_TERM 100
-
 #define USE_SERIAL
 
+/* serial.c configuration for split keyboard */
+#define SOFT_SERIAL_PIN D2
+
 /* Select hand configuration */
 #define MASTER_LEFT
 // #define MASTER_RIGHT
@@ -49,6 +48,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COLS 7
 #define MATRIX_COL_PINS { B4, E6, D7, C6, D4, F5, F4 }
 
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST