ARC: [plat-arcfpga] Enable arc_emac for ARCAngle4 Board

* Add arc_emac to DeviceTree DT description
  "Documentation/devicetree/bindings/net/arc_emac.txt".

* Update defconfig correspondingly

[vgupta: tweaked changelog]
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/boot/dts/angel4.dts

@@ -51,5 +51,21 @@
 			current-speed = <115200>;
 			status = "okay";
 		};
+
+		ethernet@c0fc2000 {
+			compatible = "snps,arc-emac";
+			reg = <0xc0fc2000 0x3c>;
+			interrupts = <6>;
+			mac-address = [ 00 11 22 33 44 55 ];
+			clock-frequency = <80000000>;
+			max-speed = <100>;
+			phy = <&phy0>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+			phy0: ethernet-phy@0 {
+				reg = <1>;
+			};
+		};
 	};
 };

arch/arc/configs/fpga_defconfig

@@ -38,6 +38,9 @@ CONFIG_INET=y
 # CONFIG_PREVENT_FIRMWARE_BUILD is not set
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 # CONFIG_BLK_DEV is not set
+CONFIG_NETDEVICES=y
+CONFIG_ARC_EMAC=y
+CONFIG_LXT_PHY=y
 # CONFIG_INPUT_MOUSEDEV_PSAUX is not set
 # CONFIG_INPUT_KEYBOARD is not set
 # CONFIG_INPUT_MOUSE is not set

arch/arc/plat-arcfpga/include/plat/irq.h

@@ -16,8 +16,6 @@
 #define UART1_IRQ	10
 #define UART2_IRQ	11
 
-#define VMAC_IRQ	6
-
 #define IDE_IRQ		13
 #define PCI_IRQ		14
 #define PS2_IRQ		15

arch/arc/plat-arcfpga/include/plat/memmap.h

@@ -15,8 +15,6 @@
 #define UART0_BASE              0xC0FC1000
 #define UART1_BASE              0xC0FC1100
 
-#define VMAC_REG_BASEADDR       0xC0FC2000
-
 #define IDE_CONTROLLER_BASE     0xC0FC9000
 
 #define AHB_PCI_HOST_BRG_BASE   0xC0FD0000