simplify board API, adding stm32f3 discovery

- remove board header since it is not used

hw/bsp/ea4357/board_ea4357.c

@@ -26,9 +26,11 @@
 
 #ifdef BOARD_EA4357
 
+#include "chip.h"
 #include "../board.h"
 #include "pca9532.h"
-#include "tusb.h"
+
+#include "tusb_option.h"
 
 #define BOARD_UART_PORT           LPC_USART0
 #define BOARD_UART_PIN_PORT       0x0f

hw/bsp/ea4357/board_ea4357.h

@@ -1,40 +0,0 @@
-/* 
- * The MIT License (MIT)
- *
- * Copyright (c) 2018, hathach (tinyusb.org)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * This file is part of the TinyUSB stack.
- */
-
-#ifndef _TUSB_BOARD_EA4357_H_
-#define _TUSB_BOARD_EA4357_H_
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-#include "chip.h"
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif /* _TUSB_BOARD_EA4357_H_ */