Sync tf_config files with internal CI

Signed-off-by: Zelalem <zelalem.aweke@arm.com>
Change-Id: I064f4f252fe7d3770719dee040feb96ea180a9bb
diff --git a/tf_config/fvp-tspd-tsp-async-irq2el3 b/tf_config/fvp-tspd-tsp-async-irq2el3
new file mode 100644
index 0000000..831a840
--- /dev/null
+++ b/tf_config/fvp-tspd-tsp-async-irq2el3
@@ -0,0 +1,6 @@
+CROSS_COMPILE=aarch64-none-elf-
+NS_TIMER_SWITCH=1
+PLAT=fvp
+SPD=tspd
+TSP_INIT_ASYNC=1
+TSP_NS_INTR_ASYNC_PREEMPT=1