ARM: dts: OMAP4: Add hwspinlock node

Add the hwspinlock device tree node for OMAP4 family
of SoCs.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4.dtsi

@@ -253,6 +253,12 @@ uart4: serial@4806e000 {
 			clock-frequency = <48000000>;
 		};
 
+		hwspinlock: spinlock@4a0f6000 {
+			compatible = "ti,omap4-hwspinlock";
+			reg = <0x4a0f6000 0x1000>;
+			ti,hwmods = "spinlock";
+		};
+
 		i2c1: i2c@48070000 {
 			compatible = "ti,omap4-i2c";
 			reg = <0x48070000 0x100>;