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/i440bx/raminit.c b/src/northbridge/intel/i440bx/raminit.c
index f191abe..bed2a51 100644
--- a/src/northbridge/intel/i440bx/raminit.c
+++ b/src/northbridge/intel/i440bx/raminit.c
@@ -387,7 +387,8 @@
 	int i, caslatency;
 	u8 dimm_start, dimm_end;
 	u16 reg16;
-	u32 addr, addr_offset;
+	void *addr;
+	u32 addr_offset;
 
 	/* Configure the RAM command. */
 	reg16 = pci_read_config16(NB, SDRAMC);
@@ -424,7 +425,7 @@
 
 		dimm_end = pci_read_config8(NB, DRB + i);
 
-		addr = (dimm_start * 8 * 1024 * 1024) + addr_offset;
+		addr = (void *)((dimm_start * 8 * 1024 * 1024) + addr_offset);
 		if (dimm_end > dimm_start) {
 #if 0
 			PRINT_DEBUG("    Sending RAM command 0x%04x to 0x%08x\n",