ramips: introduce CONFIG_PCI and CONFIG_OF_*PCI for rt288x

This is a prerequisite for F5D8235 V1 to use PCI based OHCI/EHCI.

Signed-off-by: Tobias Wolf <github-NTEO@vplace.de>

target/linux/ramips/dts/F5D8235_V1.dts

@@ -11,6 +11,10 @@
 	compatible = "F5D8235_V1", "ralink,rt2880-soc";
 	model = "Belkin F5D8235 v1";
 
+	pci@440000 {
+		status = "ok";
+	};
+
 	cfi@1f000000 {
 		compatible = "cfi-flash";
 		reg = <0xbc400000 0x800000>;

target/linux/ramips/dts/WZR-AGL300NH.dts

@@ -11,10 +11,6 @@
 	model = "Buffalo WZR-AGL300NH";
 
 	pci@440000 {
-		compatible = "ralink,rt288x-pci";
-		reg = <0x00440000 0x20000>;
-		#address-cells = <1>;
-		#size-cells = <1>;
 		status = "ok";
 	};
 

target/linux/ramips/dts/rt2880.dtsi

@@ -186,6 +186,14 @@
 		#clock-cells = <1>;
 	};
 
+	pci: pci@440000 {
+		compatible = "ralink,rt288x-pci";
+		reg = <0x00440000 0x20000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		status = "disabled";
+	};
+
 	ethernet: ethernet@400000 {
 		compatible = "ralink,rt2880-eth";
 		reg = <0x00400000 0x10000>;

target/linux/ramips/rt288x/config-4.4

@@ -141,6 +141,7 @@ CONFIG_NET_VENDOR_MEDIATEK=y
 # CONFIG_NO_IOPORT_MAP is not set
 CONFIG_OF=y
 CONFIG_OF_ADDRESS=y
+CONFIG_OF_ADDRESS_PCI=y
 CONFIG_OF_EARLY_FLATTREE=y
 CONFIG_OF_FLATTREE=y
 CONFIG_OF_GPIO=y
@@ -148,7 +149,10 @@ CONFIG_OF_IRQ=y
 CONFIG_OF_MDIO=y
 CONFIG_OF_MTD=y
 CONFIG_OF_NET=y
-# CONFIG_PCI is not set
+CONFIG_OF_PCI=y
+CONFIG_OF_PCI_IRQ=y
+CONFIG_PCI=y
+CONFIG_PCI_DOMAINS=y
 CONFIG_PERF_USE_VMALLOC=y
 CONFIG_PGTABLE_LEVELS=2
 CONFIG_PHYLIB=y