ARM: berlin: add a PWM node on the BG2

This patch adds a PWM node in the Berlin BG2 device tree, using the
newly added Berlin PWM driver.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

arch/arm/boot/dts/berlin2.dtsi

@@ -420,6 +420,13 @@ chip_rst: reset {
 			};
 		};
 
+		pwm: pwm@f20000 {
+			compatible = "marvell,berlin-pwm";
+			reg = <0xf20000 0x40>;
+			clocks = <&chip_clk CLKID_CFG>;
+			#pwm-cells = <3>;
+		};
+
 		apb@fc0000 {
 			compatible = "simple-bus";
 			#address-cells = <1>;