platform: add radxa e25 support

Signed-off-by: Nascs <nascs@radxa.com>

include/arm/radxa_e25.h

@@ -0,0 +1,30 @@
+/*
+ * Author: Nascs <nascs@radxa.com>
+ * Copyright (c) 2023 Radxa Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "mraa_internal.h"
+
+#define MRAA_RADXA_E25_GPIO_COUNT 17
+#define MRAA_RADXA_E25_I2C_COUNT  1
+#define MRAA_RADXA_E25_SPI_COUNT  2
+#define MRAA_RADXA_E25_UART_COUNT 3
+#define MRAA_RADXA_E25_PWM_COUNT  6
+#define MRAA_RADXA_E25_AIO_COUNT  1
+#define MRAA_RADXA_E25_PIN_COUNT  26
+#define PLATFORM_NAME_RADXA_E25   "Radxa E25 Carrier Board"
+
+mraa_board_t *
+        mraa_radxa_e25();
+
+#ifdef __cplusplus
+}
+#endif