qcacmn: target_if: 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 target_if replace any such comparisons with
logical operations performed on the pointer itself.

Change-Id: I436bb3ec12d331df2260507b6a9afbab84a8a54f
CRs-Fixed: 2418256

target_if/spectral/target_if_spectral_phyerr.c

@@ -1809,7 +1809,7 @@ int target_if_spectral_process_report_gen3(
 	struct spectral_report report;
 
 	spectral = get_target_if_spectral_handle_from_pdev(pdev);
-	if (spectral == NULL) {
+	if (!spectral) {
 		spectral_err("Spectral target object is null");
 		return -EINVAL;
 	}