build(qemu): Add FEAT_RME build tests for qemu

Add QEMU build tests with ENABLE_RME, to cover the extra code needed for
RME.

Change-Id: Iacaab589c8ed9fdc89bfe9687161354d8edfa92d
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
diff --git a/tf_config/qemu-rme b/tf_config/qemu-rme
new file mode 100644
index 0000000..1bef69e
--- /dev/null
+++ b/tf_config/qemu-rme
@@ -0,0 +1,4 @@
+CROSS_COMPILE=aarch64-none-elf-
+PLAT=qemu
+QEMU_USE_GIC_DRIVER=QEMU_GICV3
+ENABLE_RME=1