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)

src/mainboard/iei/kino-780am2-fam10/mptable.c

@@ -59,7 +59,8 @@ static void *smp_write_config_table(void *v)
 				  PCI_DEVFN(sbdn_sb700 + 0x14, 0));
 		if (dev) {
 			dword = pci_read_config32(dev, 0x74) & 0xfffffff0;
-			smp_write_ioapic(mc, apicid_sb700, 0x11, dword);
+			smp_write_ioapic(mc, apicid_sb700,
+					 0x11,(void *) dword);
 
 			/* Initialize interrupt mapping */
 			/* aza */