build(fvp): add Cortex-A78C model

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: I7a674011785f340832603567f7f312c6b6f4c774
diff --git a/group/tf-l2-boot-tests-cortex/fvp-dynamiq-aarch64-only:fvp-linux-dtb.dyn-fip.uboot-cortexa78cx4-debug b/group/tf-l2-boot-tests-cortex/fvp-dynamiq-aarch64-only:fvp-linux-dtb.dyn-fip.uboot-cortexa78cx4-debug
new file mode 100644
index 0000000..b8939c8
--- /dev/null
+++ b/group/tf-l2-boot-tests-cortex/fvp-dynamiq-aarch64-only:fvp-linux-dtb.dyn-fip.uboot-cortexa78cx4-debug
@@ -0,0 +1,5 @@
+#
+# Copyright (c) 2022, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#