ARM: dts: meson8: add the DDR clock controller

Add the DDR clock controller and pass it's DDR_CLKID_DDR_PLL to the main
(HHI) clock controller as "ddr_clk". The "ddr_clk" is used as one of the
inputs for the audio clock muxes.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/boot/dts/meson8.dtsi

@@ -3,6 +3,7 @@
  * Copyright 2014 Carlo Caione <carlo@caione.org>
  */
 
+#include <dt-bindings/clock/meson8-ddr-clkc.h>
 #include <dt-bindings/clock/meson8b-clkc.h>
 #include <dt-bindings/gpio/meson8-gpio.h>
 #include <dt-bindings/reset/amlogic,meson8b-clkc-reset.h>
@@ -195,6 +196,14 @@ mmcbus: bus@c8000000 {
 		#size-cells = <1>;
 		ranges = <0x0 0xc8000000 0x8000>;
 
+		ddr_clkc: clock-controller@400 {
+			compatible = "amlogic,meson8-ddr-clkc";
+			reg = <0x400 0x20>;
+			clocks = <&xtal>;
+			clock-names = "xtal";
+			#clock-cells = <1>;
+		};
+
 		dmcbus: bus@6000 {
 			compatible = "simple-bus";
 			reg = <0x6000 0x400>;
@@ -455,8 +464,8 @@ &gpio_intc {
 &hhi {
 	clkc: clock-controller {
 		compatible = "amlogic,meson8-clkc";
-		clocks = <&xtal>;
-		clock-names = "xtal";
+		clocks = <&xtal>, <&ddr_clkc DDR_CLKID_DDR_PLL>;
+		clock-names = "xtal", "ddr_pll";
 		#clock-cells = <1>;
 		#reset-cells = <1>;
 	};