qcacld-3.0: Fix function type for ol_txrx_pdev_attach_target
To address kernel control flow integrity (CFI) issues related to type
mismatch, correct the return type of ol_txrx_pdev_attach_target().
Change-Id: Icb170ad1e57513519f3d9b122ab4feed6a4efcb8
CRs-Fixed: 2402963