ARM: dts: BCM53573: Describe Tenda AC9 PCIe card in DT

Tenda AC9 has PCIe controller with just one device connected to it:
0000:00:00.0		14e4:d145	Bridge Device
└─ 0000:01:00.0		14e4:a8db	Network Controller

This card is directly on SoC (doesn't use physical connector) and has
BCM43217 chipset with bcma bus. One of its components is ChipCommon core
which is also a GPIO controller. We need to describe it to be able to
add devices using its GPIO pins.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm47189-tenda-ac9.dts

@@ -72,3 +72,30 @@ wps {
 		};
 	};
 };
+
+&pcie0 {
+	ranges = <0x00000000 0 0 0 0 0x00100000>;
+	#address-cells = <3>;
+	#size-cells = <2>;
+
+	bridge@0,0,0 {
+		reg = <0x0000 0 0 0 0>;
+		ranges = <0x00000000 0 0 0 0 0 0 0x00100000>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+
+		wifi@0,1,0 {
+			reg = <0x0000 0 0 0 0>;
+			ranges = <0x00000000 0 0 0 0x00100000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			pcie0_chipcommon: chipcommon@0 {
+				reg = <0 0x1000>;
+
+				gpio-controller;
+				#gpio-cells = <2>;
+			};
+		};
+	};
+};

arch/arm/boot/dts/bcm53573.dtsi

@@ -113,6 +113,10 @@ uart0: serial@0300 {
 			};
 		};
 
+		pcie0: pcie@2000 {
+			reg = <0x00002000 0x1000>;
+		};
+
 		usb2: usb2@4000 {
 			reg = <0x4000 0x1000>;
 			ranges;