run_config/fvp-tftf.cactus_mm: Set lava_timeout="450"

This test config seem to be failing intermittently lately due to too short
timeout.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Id582f8712fb50fd58e00d49c65dcecb753141e3f
(cherry picked from commit 9327aa863c88e4525bb2135a909c6fe106a2d284)
diff --git a/run_config/fvp-tftf.cactus_mm b/run_config/fvp-tftf.cactus_mm
index cabf50e..874f3b8 100644
--- a/run_config/fvp-tftf.cactus_mm
+++ b/run_config/fvp-tftf.cactus_mm
@@ -16,7 +16,7 @@
 }
 
 generate_lava_job_template() {
-	uart="0" file="tftf.exp" track_expect
+	uart="0" lava_timeout="450" file="tftf.exp" track_expect
 	uart="1" file="hold_uart.exp" track_expect
 	uart="2" file="hold_uart.exp" track_expect