UPSTREAM: Revert "soc/intel/apollolake: Do not use StackBase FSP-M parameter"

This reverts commit 5ede3d8ccebde6f26c6b24f6458e57d99d5f3957.
No longer needed due to FSP being updated, with the 139_40 release,
to accept StackBase field

BUG=chrome-os-partner:52784
BRANCH=none
TEST=built and booted with FSP 139_40

BUG=None
BRANCH=None
TEST=None

Change-Id: Ic832d8dc4ca87631f5fef80d4d41558d9a72630a
Original-Signed-off-by: Brandon Breitenstein <brandon.breitenstein@intel.com>
Original-Reviewed-on: https://review.coreboot.org/15068
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/351381
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
diff --git a/src/soc/intel/apollolake/romstage.c b/src/soc/intel/apollolake/romstage.c
index dec5a18..756e275 100644
--- a/src/soc/intel/apollolake/romstage.c
+++ b/src/soc/intel/apollolake/romstage.c
@@ -235,13 +235,9 @@
 	 * requests.
 	 * TODO: add checks to avoid overlap/conflict of CAR usage.
 	 */
-
-	/* fsp does not work with StackBase modified, so use default */
-#if 0
-	/* FIXME: remove this once FSP is fixed */
 	mupd->FspmArchUpd.StackBase = _car_region_end -
 					mupd->FspmArchUpd.StackSize;
-#endif
+
 	arch_upd->BootMode = FSP_BOOT_WITH_FULL_CONFIGURATION;
 
 	if (IS_ENABLED(CONFIG_CACHE_MRC_SETTINGS)) {