tests/functional/meson.build: Bump arm_aspeed_bletchley timeout

The arm_aspeed_bletchley timeout takes more than its
current 120s timeout on a debug Rust config:

$ time (cd build/rust; PYTHONPATH=../../python:../../tests/functional QEMU_TEST_QEMU_BINARY=./qemu-system-arm ./pyvenv/bin/python3 ../../tests/functional/test_arm_aspeed_bletchley.py)
TAP version 13
ok 1 test_arm_aspeed_bletchley.BletchleyMachine.test_arm_ast2600_bletchley_openbmc
1..1

real    2m15.536s
user    3m21.444s
sys     0m11.558s

Bump it up to 480s, same as arm_aspeed_rainier.

Signed-off-by: Peter Maydell <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>

Author: pm215

tests/functional/meson.build

@@ -26,7 +26,7 @@ test_timeouts = {
   'arm_aspeed_witherspoon' : 120,
   'arm_aspeed_ast2500' : 720,
   'arm_aspeed_ast2600' : 1200,
-  'arm_aspeed_bletchley' : 120,
+  'arm_aspeed_bletchley' : 480,
   'arm_aspeed_rainier' : 480,
   'arm_bpim2u' : 500,
   'arm_collie' : 180,