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/i82801ix/sata.c b/src/southbridge/intel/i82801ix/sata.c
index 10c8a2b..f65eba2 100644
--- a/src/southbridge/intel/i82801ix/sata.c
+++ b/src/southbridge/intel/i82801ix/sata.c
@@ -36,8 +36,8 @@
 	u32 reg32;
 
 	/* Initialize AHCI memory-mapped space */
-	const u32 abar = pci_read_config32(dev, PCI_BASE_ADDRESS_5);
-	printk(BIOS_DEBUG, "ABAR: %08X\n", abar);
+	u8 *abar = (u8 *)pci_read_config32(dev, PCI_BASE_ADDRESS_5);
+	printk(BIOS_DEBUG, "ABAR: %p\n", abar);
 
 	/* Set AHCI access mode.
 	   No other ABAR registers should be accessed before this. */
@@ -67,7 +67,7 @@
 	for (i = 0; i < 6; ++i) {
 		if (((i == 2) || (i == 3)) && is_mobile)
 			continue;
-		const u32 addr = abar + 0x118 + (i * 0x80);
+		u8 *addr = abar + 0x118 + (i * 0x80);
 		write32(addr, read32(addr));
 	}
 }