broadwell: fix typo

It's guarded by a non-standard configuration option, so didn't trigger.

Change-Id: Ib7a9a45befcb7857edde37e20de7d65a60970882
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10623
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/soc/intel/broadwell/romstage/romstage.c

@@ -126,7 +126,7 @@ void romstage_common(struct romstage_params *params)
 		printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
 
 #if CONFIG_LPC_TPM
-	init_tpm(prev_sleep_state == SLEEP_STATE_S3);
+	init_tpm(params->power_state->prev_sleep_state == SLEEP_STATE_S3);
 #endif
 }