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/northbridge/intel/gm45/gm45.h b/src/northbridge/intel/gm45/gm45.h
index 5bdf9e4..a31ea7d 100644
--- a/src/northbridge/intel/gm45/gm45.h
+++ b/src/northbridge/intel/gm45/gm45.h
@@ -187,10 +187,15 @@
 					(could be reduced to 10 bytes) */
 
 
+#ifndef __ACPI__
+#define DEFAULT_MCHBAR		((u8 *)0xfed14000)
+#define DEFAULT_DMIBAR		((u8 *)0xfed18000)
+#else
 #define DEFAULT_MCHBAR		0xfed14000
 #define DEFAULT_DMIBAR		0xfed18000
+#endif
 #define DEFAULT_EPBAR		0xfed19000
-#define DEFAULT_HECIBAR		0xfed1a000
+#define DEFAULT_HECIBAR		((u8 *)0xfed1a000)
 
 				/* 4 KB per PCIe device */
 #define DEFAULT_PCIEXBAR	CONFIG_MMCONF_BASE_ADDRESS