cpu,mb,nb,soc: use HPET_BASE_ADDRESS instead of magic number

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I570f7de90007b67d811d158ca33e099d5cc2d5d3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62308
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/cpu/amd/agesa/family15tn/fixme.c b/src/cpu/amd/agesa/family15tn/fixme.c
index ebfa07d..feb85bf 100644
--- a/src/cpu/amd/agesa/family15tn/fixme.c
+++ b/src/cpu/amd/agesa/family15tn/fixme.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <arch/hpet.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/amd/msr.h>
 #include <cpu/amd/mtrr.h>
@@ -28,7 +29,7 @@
 	PciData |= 1 << 7;    /* set NP (non-posted) bit */
 	LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
 	PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0x80);
-	PciData = (0xFED00000 >> 8) | 3; /* lowest NP address is HPET at FED00000 */
+	PciData = (HPET_BASE_ADDRESS >> 8) | 3; /* lowest NP address is HPET at FED00000 */
 	LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
 
 	/* Map the remaining PCI hole as posted MMIO */