qcacld-3.0: pld: Replace explicit comparison to NULL

Per the Linux Kernel coding style, as enforced by the kernel
checkpatch script, pointers should not be explicitly compared to
NULL. Therefore within pld replace any such comparisons with logical
operations performed on the pointer itself.

Change-Id: I8092ddbb80bb39fc6ff560cca34e021b115f7fd7
CRs-Fixed: 2418390
5 files changed