Populate FVP YAML files for cortex-a55x4 and cortex-a55x4-a75x4 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-a55x4' and
'cortex-a55x4-a75x4' models.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: If30c3c641d1d1dd4b46f29ed3b662ed847a14a85
diff --git a/run_config/fvp-cortexa55x4a76x2 b/run_config/fvp-cortexa55x4a76x2
index 3f45a2c..7c027ac 100644
--- a/run_config/fvp-cortexa55x4a76x2
+++ b/run_config/fvp-cortexa55x4a76x2
@@ -10,4 +10,8 @@
 	cache_state_modelled="0" \
 	gen_model_params
 	uart="0" set_expect_variable "num_cpus" "6"
+
+	model="cortex-a55x4-a76x2" \
+	model_bin="FVP_Base_Cortex-A55x4+Cortex-A76x2" \
+	       gen_fvp_yaml
 }