qcacld-3.0: Use QDF API to check driver unload in DSC

Use newly defined QDF API in CMN qdf_is_driver_unloading() to check
if driver unload is in progress in DSC.

Change-Id: I2958c6cc3ee6f2ac4302e2dbbf1c68d986fea175
CRs-Fixed: 2605706
2 files changed