x86: Change MMIO addr in readN(addr)/writeN(addr, val) to pointer

On x86, change the type of the address parameter in
read8()/read16/read32()/write8()/write16()/write32() to be a
pointer, instead of unsigned long.

Change-Id: Ic26dd8a72d82828b69be3c04944710681b7bd330
Signed-off-by: Kevin Paul Herbert <kph@meraki.net>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/7784
Tested-by: build bot (Jenkins)
diff --git a/src/southbridge/intel/bd82x6x/lpc.c b/src/southbridge/intel/bd82x6x/lpc.c
index 11b765a..c323f73 100644
--- a/src/southbridge/intel/bd82x6x/lpc.c
+++ b/src/southbridge/intel/bd82x6x/lpc.c
@@ -59,17 +59,17 @@
 	/* Enable ACPI I/O range decode */
 	pci_write_config8(dev, ACPI_CNTL, ACPI_EN);
 
-	set_ioapic_id(IO_APIC_ADDR, 0x02);
+	set_ioapic_id(VIO_APIC_VADDR, 0x02);
 
 	/* affirm full set of redirection table entries ("write once") */
-	reg32 = io_apic_read(IO_APIC_ADDR, 0x01);
-	io_apic_write(IO_APIC_ADDR, 0x01, reg32);
+	reg32 = io_apic_read(VIO_APIC_VADDR, 0x01);
+	io_apic_write(VIO_APIC_VADDR, 0x01, reg32);
 
 	/*
 	 * Select Boot Configuration register (0x03) and
 	 * use Processor System Bus (0x01) to deliver interrupts.
 	 */
-	io_apic_write(IO_APIC_ADDR, 0x03, 0x01);
+	io_apic_write(VIO_APIC_VADDR, 0x03, 0x01);
 }
 
 static void pch_enable_serial_irqs(struct device *dev)