qcacmn: Add NAPI stats

Add basic stats to track NAPI polls & schedules.

Change-Id: Iea8f21fc08d4a5de62e00f32ffdc020f8364ced1
CRs-Fixed: 2083867

hif/inc/hif.h

@@ -895,6 +895,7 @@ void hif_update_pipe_callback(struct hif_opaque_softc *osc,
 				u_int8_t pipeid,
 				struct hif_msg_callbacks *callbacks);
 
+void hif_print_napi_stats(struct hif_opaque_softc *hif_ctx);
 #ifdef __cplusplus
 }
 #endif