sb/intel/i82801ix: Use pmutil.h definitions

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

Tested with BUILD_TIMELESS=1, Roda RK9 remains identical.

Change-Id: I3ddd133a4e81a7f6ce9c33ce227b40006a0d1850
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42658
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/gm45/romstage.c b/src/northbridge/intel/gm45/romstage.c
index f7998c9..d510612 100644
--- a/src/northbridge/intel/gm45/romstage.c
+++ b/src/northbridge/intel/gm45/romstage.c
@@ -11,6 +11,7 @@
 #include <southbridge/intel/i82801ix/i82801ix.h>
 #include <southbridge/intel/common/gpio.h>
 #include <southbridge/intel/common/pmclib.h>
+#include <southbridge/intel/common/pmutil.h>
 #include <string.h>
 
 #define LPC_DEV PCI_DEV(0, 0x1f, 0)