wma_needShutdown related code is now obselete, during the cds_preenable
failure, this is obselete code is being invoked which is setting
wma->needShutdown. If the same is set the wma_close will not be
inokved resulting in the reference leak of of pdev object.
Remove obselete wma_needShutdown code.
Change-Id: Ia1463c9197593165eb5844e154f78fe3fe278fbd
CRs-Fixed: 2947133