Generate FVP's Linux/TFTF FVP templates

FVP YAML file generation is a two step process: 1. yaml template
creation and 2. fvp values replacement on template created by 1. This
patch only relates to 1, creating the corresponding Linux or TFTF
templates.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I1d666e6f7c38d68f66439697e599512673d874f4
diff --git a/run_config/fvp-tftf.fwu b/run_config/fvp-tftf.fwu
index 1352f28..43728d6 100644
--- a/run_config/fvp-tftf.fwu
+++ b/run_config/fvp-tftf.fwu
@@ -25,4 +25,6 @@
 
 fetch_tf_resource() {
 	uart="0" timeout="900" file="tftf.exp" track_expect
+
+	payload_type="tftf" gen_fvp_yaml_template
 }