renesas-ra: Change MICROPY_HW_BOARD_NAME definition to product name.

Changes in this commit:
- Change MICROPY_HW_BOARD_NAME definition to match the product name.
- Rename board folder's name to match the product name style.
- Change related files like Makefile, document descriptions, test cases, CI
  and tools.

Signed-off-by: Takeo Takahashi <takeo.takahashi.xv@renesas.com>

ports/renesas-ra/boards/EK_RA6M1/ra6m1_ek_conf.h

@@ -0,0 +1,30 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Renesas Electronics Corporation
+ *
+ * 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.
+ */
+
+#ifndef RA6M1_EK_CONF_H
+#define RA6M1_EK_CONF_H
+
+#define DEBUG_CH    0
+
+#endif /* RA6M1_EK_CONF_H */