Changes to platform device handling, irqs, userspace device configuration

Revised irq handling and device address naming on internal devices.

src/drivers/irq/pl190/pl190_vic.c

@@ -32,10 +32,11 @@
 l4id_t pl190_read_irq(void)
 {
 	l4id_t irq;
-	 if ((irq =__clz(read(PL190_VIC_IRQSTATUS))))
-		 return irq;
-	 else
+
+	 if ((irq = (31 - __clz(read(PL190_VIC_IRQSTATUS)))) < 0)
 		 return IRQ_NIL;
+	 else
+		 return irq;
 }
 
 void pl190_mask_irq(l4id_t irq)
@@ -60,10 +61,10 @@ l4id_t pl190_sic_read_irq(void)
 {
 	l4id_t irq;
 
-	if ((irq =__clz(read(PL190_SIC_STATUS))))
-		return irq;
-	else
+	if ((irq =(31 - __clz(read(PL190_SIC_STATUS)))) < 0)
 		return IRQ_NIL;
+	else
+		return irq;
 }
 
 void pl190_sic_mask_irq(l4id_t irq)

src/drivers/uart/pl011/pl011_uart.c

@@ -233,7 +233,7 @@ int pl011_initialise_device(struct pl011_uart * uart)
 	/* Initialise data register for 8 bit data read/writes */
 	pl011_set_word_width(uart->base, 8);
 
-	/* 
+	/*
 	 * Fifos are disabled because by default it is assumed the port
 	 * will be used as a user terminal, and in that case the typed
 	 * characters will only show up when fifos are flushed, rather than