ARM: rmobile: Add R8A77965 Salvator-XS board support

Add R8A77965 M3N Salvator-XS development kit support. This kit is
similar to the other Salvator-X(S) ones, except is has M3N SoC on
it.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r8a77965-salvator-x-u-boot.dts b/arch/arm/dts/r8a77965-salvator-x-u-boot.dts
new file mode 100644
index 0000000..d18b5bf
--- /dev/null
+++ b/arch/arm/dts/r8a77965-salvator-x-u-boot.dts
@@ -0,0 +1,10 @@
+/*
+ * Device Tree Source extras for U-Boot for the M3N Salvator-XS board
+ *
+ * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include "r8a77965-salvator-x.dts"
+#include "r8a77965-u-boot.dtsi"