fvp-tftf.cactus_mm: Further increase timeout for this test to 600s

Still keeps failing with shorter timeouts, e.g.

https://tuxapi.tuxsuite.com/v1/groups/tfc/projects/ci/tests/2cAUjY7qb3f9REtG6TKoHymvC2N

vs

https://tuxapi.tuxsuite.com/v1/groups/tfc/projects/ci/tests/2cAQEpDqDw3QFWfZJJq8p5N8fvT
https://tuxapi.tuxsuite.com/v1/groups/tfc/projects/ci/tests/2cAOqjOgYcFIWlMQTia7Fpme3iV

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I8e792a07928c0f63954e8c166300614cef292f7b
diff --git a/run_config/fvp-tftf.cactus_mm b/run_config/fvp-tftf.cactus_mm
index 874f3b8..fc283e8 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" lava_timeout="450" file="tftf.exp" track_expect
+	uart="0" lava_timeout="600" file="tftf.exp" track_expect
 	uart="1" file="hold_uart.exp" track_expect
 	uart="2" file="hold_uart.exp" track_expect