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/Makefile b/arch/arm/dts/Makefile
index 2b17a5f..20a4c37 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -410,6 +410,7 @@
 	r8a7795-salvator-x.dtb \
 	r8a7796-m3ulcb.dtb \
 	r8a7796-salvator-x.dtb \
+	r8a77965-salvator-x.dtb \
 	r8a77970-eagle.dtb \
 	r8a77995-draak.dtb