sb/intel/i82801jx: Use pmutil.h definitions

Also drop now-redundant definitions and include headers where needed.

Tested with BUILD_TIMELESS=1, Intel DG43GT remains identical.

Change-Id: I2fb46bb04d96df5e8261f49e0fd4d88eedca6084
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42659
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/i82801jx/lpc.c b/src/southbridge/intel/i82801jx/lpc.c
index 815a205..c36009e 100644
--- a/src/southbridge/intel/i82801jx/lpc.c
+++ b/src/southbridge/intel/i82801jx/lpc.c
@@ -21,6 +21,7 @@
 #include "i82801jx.h"
 #include "nvs.h"
 #include <southbridge/intel/common/pciehp.h>
+#include <southbridge/intel/common/pmutil.h>
 #include <southbridge/intel/common/acpi_pirq_gen.h>
 
 #define NMI_OFF	0