sb/intel/lynxpoint: Replace HPET_ADDR

The `HPET_ADDRESS` Kconfig option has the same value. Use it instead.

Change-Id: I268e949d4396aa20e38f719b36cc4e6226efe082
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49743
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/southbridge/intel/lynxpoint/pch.h

@@ -63,8 +63,6 @@
 #define DEFAULT_GPIOSIZE	0x80
 #endif
 
-#define HPET_ADDR		0xfed00000
-
 #include <southbridge/intel/common/rcba.h>
 
 #ifndef __ACPI__