Unify IO APIC address specification

Some places still hardcoded the address instead of using IO_APIC_ADDR.

Change-Id: I3941c1ff62972ce56a5bc466eab7134f901773d3
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/677
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/southbridge/amd/cimx/sb800/lpc.c b/src/southbridge/amd/cimx/sb800/lpc.c
index bc643b5..856b8b3 100644
--- a/src/southbridge/amd/cimx/sb800/lpc.c
+++ b/src/southbridge/amd/cimx/sb800/lpc.c
@@ -19,6 +19,7 @@
 
 #include <console/console.h>
 #include <device/pci.h>
+#include <arch/ioapic.h>
 #include "lpc.h"
 
 
@@ -45,8 +46,8 @@
 	res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
-	res = new_resource(dev, 3); /* IOAPIC */
-	res->base = 0xfec00000;
+	res = new_resource(dev, 3);
+	res->base = IO_APIC_ADDR;
 	res->size = 0x00001000;
 	res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;