sh: r2dplus: Enable OF control

Enable OF control for SH4 R2Dplus board. This is necessary, because
the PCI uclass is designed in a way that makes it depend on DT and
disallows instanciating devices without DT (e.g. with platdata).

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/sh/dts/sh7751-r2dplus.dts b/arch/sh/dts/sh7751-r2dplus.dts
new file mode 100644
index 0000000..2d291bf
--- /dev/null
+++ b/arch/sh/dts/sh7751-r2dplus.dts
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the SH7751 R2Dplus
+ *
+ * Copyright (C) 2019 Marek Vasut <marek.vasut@gmail.com>
+ */
+
+/dts-v1/;
+/ {
+	model = "R2D";
+	compatible = "renesas,r2d", "renesas,sh7751";
+};