fvp: use common yaml template utilities

Generic template expansion utilities were implemented with the QEMU
platform port. For consistency, and to reduce duplication, other
platforms should use these utilities where possible.

Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Change-Id: Ic46442d82ccaf5c3e17c61f702f571d928932907
diff --git a/run_config/fvp-linux.morello b/run_config/fvp-linux.morello
index 7cb1460..6c7f1e2 100644
--- a/run_config/fvp-linux.morello
+++ b/run_config/fvp-linux.morello
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Copyright (c) 2021-2022, Arm Limited. All rights reserved.
+# Copyright (c) 2021-2023, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -18,5 +18,5 @@
 	set_uart_port "${archive:?}" 2 5000
 	set_uart_port "${archive:?}" 3 5002
 
-	payload_type="linux" gen_fvp_yaml_template
+	payload_type="linux" gen_yaml_template
 }