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/Kconfig b/arch/Kconfig
index f4ada57..141e48b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -137,6 +137,7 @@
 config SH
 	bool "SuperH architecture"
 	select HAVE_PRIVATE_LIBGCC
+	select SUPPORT_OF_CONTROL
 
 config X86
 	bool "x86 architecture"