platform: sifive: Add initial support for SiFive development platform

Add initial platform support for SiFive development platforms
with the "sifive-dev" compatible string.

Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com>
Link: https://lore.kernel.org/r/20260224031733.3817148-1-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>

platform/generic/sifive/sifive_dev_platform.c

@@ -0,0 +1,23 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2026 SiFive Inc.
+ */
+
+#include <platform_override.h>
+
+static int sifive_platform_init(const void *fdt, int nodeoff,
+				const struct fdt_match *match)
+{
+	return 0;
+}
+
+static const struct fdt_match sifive_dev_platform_match[] = {
+	{ .compatible = "sifive-dev" },
+	{ },
+};
+
+const struct fdt_driver sifive_dev_platform = {
+	.match_table = sifive_dev_platform_match,
+	.init = sifive_platform_init,
+};