[Keyboard] Add support for matrix_scan_user to usb-usb converter (#5291)

* [Keyboard] Add support for matrix_scan_user to usb-usb converter

* update to matrix_scan_quantum

* also add init calls

keyboards/converter/usb_usb/custom_matrix.cpp

@@ -98,6 +98,7 @@ extern "C"
         kbd2.SetReportParser(0, (HIDReportParser*)&kbd_parser2);
         kbd3.SetReportParser(0, (HIDReportParser*)&kbd_parser3);
         kbd4.SetReportParser(0, (HIDReportParser*)&kbd_parser4);
+        matrix_init_quantum();
     }
 
     static void or_report(report_keyboard_t report) {
@@ -115,6 +116,25 @@ extern "C"
         }
     }
 
+    __attribute__ ((weak))
+    void matrix_init_kb(void) {
+        matrix_init_user();
+    }
+
+    __attribute__ ((weak))
+    void matrix_init_user(void) {
+        matrix_init_user();
+    }
+
+    __attribute__ ((weak))
+    void matrix_scan_kb(void) {
+        matrix_scan_user();
+    }
+
+    __attribute__ ((weak))
+    void matrix_scan_user(void) {
+    }
+
     uint8_t matrix_scan(void) {
         static uint16_t last_time_stamp1 = 0;
         static uint16_t last_time_stamp2 = 0;
@@ -169,6 +189,7 @@ extern "C"
                 keyboard_set_leds(host_keyboard_leds());
             }
         }
+        matrix_scan_quantum();
         return 1;
     }