Add test configurations for FEAT_RME

The patch makes the following changes:
* Adds test configurations for the following scenarios:
  ==================================================
  BL32	RMM	BL33	Test configuration
  ==================================================
  SPM	TRP	TFTF	fvp-spm.trp.tftf-tftf.rme
  None	TRP	TFTF	fvp-trp.tftf-tftf.rme

* Adds an FVP model that supports FEAT_RME

* Updates tf-cov-make with FEAT_RME build configuration

Change-Id: Ibc404c0c60022406027dba06bbcb230df3ab133e
Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
diff --git a/tf_config/fvp-rme b/tf_config/fvp-rme
new file mode 100644
index 0000000..da2e805
--- /dev/null
+++ b/tf_config/fvp-rme
@@ -0,0 +1,4 @@
+CROSS_COMPILE=aarch64-none-elf-
+PLAT=fvp
+ENABLE_RME=1
+FVP_HW_CONFIG_DTS=fdts/fvp-base-gicv3-psci-1t.dts