qtest: Bump npcm7xx_watchdog_timer-test timeout to 2 minutes

The npcm7xx_watchdog_timer-test can take more than 60 seconds in
SPEED=slow mode on a loaded host system.

Bumping to 2 minutes will give more headroom.

Message-ID: <20240112164717.1063954-1-thuth@redhat.com>
Reviewed-by: "Daniel P. Berrangé" <berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/meson.build

@@ -4,6 +4,7 @@ slow_qtests = {
   'device-introspect-test' : 720,
   'migration-test' : 480,
   'npcm7xx_pwm-test': 300,
+  'npcm7xx_watchdog_timer-test': 120,
   'qom-test' : 900,
   'test-hmp' : 240,
   'pxe-test': 600,