qtest: bump aspeed_smc-test timeout to 6 minutes

On a loaded system with --enable-debug, this test can take longer than
5 minutes. Raising the timeout to 6 minutes gives greater headroom for
such situations.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
[thuth: Increase the timeout to 6 minutes for very loaded systems]
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20231215070357.10888-11-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
(cherry picked from commit e8a12fe)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(Mjt: context fixup in tests/qtest/meson.build)

tests/qtest/meson.build

@@ -1,5 +1,6 @@
 slow_qtests = {
   'ahci-test' : 60,
+  'aspeed_smc-test': 360,
   'bios-tables-test' : 120,
   'boot-serial-test' : 60,
   'migration-test' : 150,