ARM: ux500: Add db8500 Device Tree node for misc/ab8500-pwm

This adds the DT node for the misc/ab8500-pwm driver. It will
allow probing of the driver during a Device Tree enabled boot.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

arch/arm/boot/dts/db8500.dtsi

@@ -332,6 +332,10 @@ ab8500-sysctrl {
 					compatible = "stericsson,ab8500-sysctrl";
 				};
 
+				ab8500-pwm {
+					compatible = "stericsson,ab8500-pwm";
+				};
+
 				ab8500-regulators {
 					compatible = "stericsson,ab8500-regulator";