qcacld-3.0: Reduce time between Ref Leak prints
Currently the Vdev Ref Leak functionality prints holders of references
every 10 seconds, resulting in only two prints before a device crash.
Fix this by reducing the timeout macro from 10 seconds to 4 seconds.
Change-Id: Icc1046a5678d4b224c2bc715d27fed092836e269
CRs-Fixed: 3292752