qcacld-3.0: Fix incorrect valid pointer checking

There is an incorret valid pointer checking after memory
allocation for monitor mode, which will cause net device up
failure. Fix this incorrect checking.

CRs-Fixed: 2338747
Change-Id: Ib1dd4d85ce7e7cace1167a082c103fb0300eb16a

core/sme/src/common/sme_api.c

@@ -14027,7 +14027,7 @@ QDF_STATUS sme_create_mon_session(tHalHandle hal_handle, tSirMacAddr bss_id,
 	struct sir_create_session *msg;
 
 	msg = qdf_mem_malloc(sizeof(*msg));
-	if (!msg) {
+	if (msg) {
 		msg->type = eWNI_SME_MON_INIT_SESSION;
 		msg->vdev_id = vdev_id;
 		msg->msg_len = sizeof(*msg);