Increase gpio width to 8

src/main/scala/unleashed/u500ml507devkit/Config.scala

@@ -30,7 +30,7 @@ class U500ML507DevKitPeripherals extends Config((site, here, up) => {
   case PeripherySPIKey => List(
     SPIParams(rAddress = BigInt(0x64001000L)))
   case PeripheryGPIOKey => List(
-    GPIOParams(address = BigInt(0x64002000L), width = 4))
+    GPIOParams(address = BigInt(0x64002000L), width = 8))
   case PeripheryMaskROMKey => List(
     MaskROMParams(address = 0x10000, name = "BootROM"))
 })

src/main/scala/unleashed/u500ml507devkit/FPGAChip.scala

@@ -60,9 +60,6 @@ class U500ML507DevKitFPGAChip(implicit override val p: Parameters)
     gpio_pins.pins.zipWithIndex.foreach {
       case(pin, idx) => led(idx) := pin.o.oval
     }
-
-    // tie to zero
-    for( idx <- 7 to 4 ) { led(idx) := false.B }
   }
 
 }