Populate FVP YAML files for cortex-a57x4 and cortex-a57x-a53x models

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 2 and specifically for 'cortex-a53x4' and
'cortex-a57x-a53x' models.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: If04d5ad8b07831bbbfcc01aede0c475c7dddf99c
diff --git a/run_config/fvp-cortexa57x1a53x1 b/run_config/fvp-cortexa57x1a53x1
index 8051073..d18edbc 100644
--- a/run_config/fvp-cortexa57x1a53x1
+++ b/run_config/fvp-cortexa57x1a53x1
@@ -8,4 +8,8 @@
 post_fetch_tf_resource() {
 	model="cortex-a57x1-a53x1" gen_model_params
         uart="0" set_expect_variable "num_cpus" "2"
+
+	model="cortex-a57x1-a53x1" \
+	model_bin="FVP_Base_Cortex-A57x1-A53x1" \
+	       gen_fvp_yaml
 }