i82801gx: replace cafed00d/cafebabe by defines

We're using '0xcafed00d' all over the code as magic for ACPI S3
resume. Let's add a define for that. Also replace 0xcafebabe by
a define.

Change-Id: I5f5dc09561679d19f98771c4f81830a50202c69f
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/33
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/intel/d945gclf/romstage.c b/src/mainboard/intel/d945gclf/romstage.c
index cba3146..d1ead82 100644
--- a/src/mainboard/intel/d945gclf/romstage.c
+++ b/src/mainboard/intel/d945gclf/romstage.c
@@ -290,7 +290,7 @@
 			memcpy(resume_backup_memory, (void *)CONFIG_RAMBASE, HIGH_MEMORY_SAVE);
 
 		/* Magic for S3 resume */
-		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
+		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, SKPAD_ACPI_S3_MAGIC);
 	}
 #endif
 }