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/northbridge/intel/haswell/haswell.h

@@ -32,7 +32,11 @@
 /* Northbridge BARs */
 #define DEFAULT_PCIEXBAR	CONFIG_MMCONF_BASE_ADDRESS	/* 4 KB per PCIe device */
 #define DEFAULT_MCHBAR		0xfed10000	/* 16 KB */
+#ifndef __ACPI__
+#define DEFAULT_DMIBAR		((u8 *)0xfed18000)	/* 4 KB */
+#else
 #define DEFAULT_DMIBAR		0xfed18000	/* 4 KB */
+#endif
 #define DEFAULT_EPBAR		0xfed19000	/* 4 KB */
 
 #include <southbridge/intel/lynxpoint/pch.h>