qcacld-3.0: Deregister HIF ext groups on rmmod

- Deregister & free the hif ext ctx when detaching DP interrupts.
- Unregister the hotcpu_notifier during rmmod.

Change-Id: I35cf8b22ff785e90f6e6fd976e83e46a126f95e2
CRs-Fixed: 2086729

core/hdd/src/wlan_hdd_napi.c

@@ -182,6 +182,14 @@ int hdd_napi_destroy(int force)
 							i,
 							NAPI_PIPE2ID(i), force);
 				}
+	} else {
+		struct hif_opaque_softc *hif_ctx;
+		hif_ctx = cds_get_context(QDF_MODULE_ID_HIF);
+
+		if (unlikely(NULL == hif_ctx))
+			QDF_ASSERT(NULL != hif_ctx);
+		else
+			rc = hif_napi_cpu_deinit(hif_ctx);
 	}
 
 	/* if all instances are removed, it is likely that hif_context has been