can: flexcan: add platform data header

Add platform data header for flexcan.

Link: https://lore.kernel.org/r/20210702094841.327679-1-angelo@kernel-space.orgSigned-off-by: NAngelo Dureghello <angelo@kernel-space.org>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

include/linux/can/platform/flexcan.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021  Angelo Dureghello <angelo@kernel-space.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _CAN_PLATFORM_FLEXCAN_H
+#define _CAN_PLATFORM_FLEXCAN_H
+
+struct flexcan_platform_data {
+	u32 clock_frequency;
+	u8 clk_src;
+};
+
+#endif /* _CAN_PLATFORM_FLEXCAN_H */