romstage_handoff: remove code duplication

The same pattern was being used throughout the code base
for initializing the romstage handoff structure. Provide
a helper function to initialize the structure with the S3
resume state then utilize it at all the existing call sites.

Change-Id: I1e9d588ab6b9ace67757387dbb5963ae31ceb252
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17646
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/cpu/intel/haswell/romstage.c b/src/cpu/intel/haswell/romstage.c
index 48920b3..7eb115c 100644
--- a/src/cpu/intel/haswell/romstage.c
+++ b/src/cpu/intel/haswell/romstage.c
@@ -172,7 +172,6 @@
 {
 	int boot_mode;
 	int wake_from_s3;
-	struct romstage_handoff *handoff;
 
 	timestamp_init(get_initial_timestamp());
 	timestamp_add_now(TS_START_ROMSTAGE);
@@ -245,11 +244,7 @@
 	#endif
 	}
 
-	handoff = romstage_handoff_find_or_add();
-	if (handoff != NULL)
-		handoff->s3_resume = wake_from_s3;
-	else
-		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
+	romstage_handoff_init(wake_from_s3);
 
 	post_code(0x3f);
 	if (IS_ENABLED(CONFIG_LPC_TPM)) {