feat(handoff): add TL source files to BL1

Change-Id: Id9843ba0ccfb448cf17e09e0659b743741ae01ac
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/lib/transfer_list/transfer_list.mk b/lib/transfer_list/transfer_list.mk
index 42574e8..3ec4df2 100644
--- a/lib/transfer_list/transfer_list.mk
+++ b/lib/transfer_list/transfer_list.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2023, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2023-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -15,6 +15,7 @@
 
 BL31_SOURCES	+=	$(TRANSFER_LIST_SOURCES)
 BL2_SOURCES	+=	$(TRANSFER_LIST_SOURCES)
+BL1_SOURCES	+=	$(TRANSFER_LIST_SOURCES)
 
 endif	# TRANSFER_LIST