amdfwtool: Add missing help information for --combo-config1

Change-Id: I6b69965991daadaf8b4148b06d0715b087021c9b
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73928
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
diff --git a/util/amdfwtool/amdfwtool.c b/util/amdfwtool/amdfwtool.c
index fb371e7..6d483d0 100644
--- a/util/amdfwtool/amdfwtool.c
+++ b/util/amdfwtool/amdfwtool.c
@@ -175,6 +175,7 @@
 
 	printf("\nPSP options:\n");
 	printf("--use-combo                    Use the COMBO layout\n");
+	printf("--combo-config1 <config file>  Config for 1st combo entry\n");
 	printf("--multilevel                   Generate primary and secondary tables\n");
 	printf("--nvram <FILE>                 Add nvram binary\n");
 	printf("--soft-fuse                    Set soft fuse\n");