qcacld-3.0: ipa: 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 ipa replace any such comparisons with logical
operations performed on the pointer itself.

Change-Id: I82e4bed12122ad5aea47650f6d75e72a52207883
CRs-Fixed: 2418401
2 files changed