ARM: shmobile: r7s72100: Add MTU2 device to DT

Add the MTU2 counter to the r7s72100 device tree and make it disabled by
default.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
[horms+renesas@verge.net.au correct irq number]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r7s72100.dtsi

@@ -229,6 +229,16 @@ i2c3: i2c@fcfeec00 {
 		status = "disabled";
 	};
 
+	mtu2: timer@fcff0000 {
+		compatible = "renesas,mtu2";
+		reg = <0xfcff0000 0x400>;
+		interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "tgi0a";
+		clocks = <&mstp3_clks R7S72100_CLK_MTU2>;
+		clock-names = "fck";
+		status = "disabled";
+	};
+
 	scif0: serial@e8007000 {
 		compatible = "renesas,scif-r7s72100", "renesas,scif";
 		reg = <0xe8007000 64>;