util/amdfwtool: remove unused union from embedded_firmware struct

Since commit 2f6b7d557d97 ("amdfwtool: Move the filling of table headers
into functions"), the combo_psp_directory union element in the
embedded_firmware is unused and the new_psp_directory element is used in
all places, so replace the union of new_psp_directory and
combo_psp_directory with just the new_psp_directory struct element.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I35d339b3084ec8f93210095c233f5e68296d0013
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73834
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
diff --git a/util/amdfwtool/amdfwtool.h b/util/amdfwtool/amdfwtool.h
index 23dc0ac..5d6047c 100644
--- a/util/amdfwtool/amdfwtool.h
+++ b/util/amdfwtool/amdfwtool.h
@@ -148,10 +148,7 @@
 	uint32_t gec_entry;
 	uint32_t xhci_entry;
 	uint32_t psp_directory;
-	union {
-		uint32_t new_psp_directory;
-		uint32_t combo_psp_directory;
-	};
+	uint32_t new_psp_directory; /* also used as combo_psp_directory */
 	uint32_t bios0_entry; /* todo: add way to select correct entry */
 	uint32_t bios1_entry;
 	uint32_t bios2_entry;