soc/amd/cezanne/include/iomap: add HPET base address

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I72559147a3f86f0cb843b74af9b148d23229ff14
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50623
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/cezanne/include/soc/iomap.h

@@ -5,6 +5,12 @@
 
 /* MMIO Ranges */
 #define SPI_BASE_ADDRESS		0xfec10000
+
+#if CONFIG(HPET_ADDRESS_OVERRIDE)
+#error HPET address override is not allowed and must be fixed at 0xfed00000
+#endif
+#define HPET_BASE_ADDRESS		0xfed00000
+
 /* FCH AL2AHB Registers */
 #define ALINK_AHB_ADDRESS		0xfedc0000