MIPS: BMIPS: dts: add BCM6328 power domain support

BCM6328 SoCs have a power domain controller to enable/disable certain
components in order to save power.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/mips/boot/dts/brcm/bcm6328.dtsi

@@ -110,6 +110,12 @@ leds0: led-controller@10000800 {
 			status = "disabled";
 		};
 
+		periph_pwr: power-controller@10001848 {
+			compatible = "brcm,bcm6328-power-controller";
+			reg = <0x10001848 0x4>;
+			#power-domain-cells = <1>;
+		};
+
 		ehci: usb@10002500 {
 			compatible = "brcm,bcm6328-ehci", "generic-ehci";
 			reg = <0x10002500 0x100>;