Add TF-A test configurations

Signed-off-by: Zelalem <zelalem.aweke@arm.com>
Change-Id: Ie2fd42a804d84d751fb8ff16698fc2b9e361aa10
diff --git a/tftf_config/fvp-unstable b/tftf_config/fvp-unstable
new file mode 100644
index 0000000..a3a73bb
--- /dev/null
+++ b/tftf_config/fvp-unstable
@@ -0,0 +1,3 @@
+CROSS_COMPILE=aarch64-none-elf-
+PLAT=fvp
+TESTS=unstable