qcacmn: Dump flow pool stats as part of periodic stats display

Dump flow pool stats even for low verbosity level as
part of periodic stats display.

Change-Id: Iea59d20b0a81cfd0bfdac65ad54a11fa33f30f2f
CRs-Fixed: 3031168

dp/wifi3.0/dp_tx.c

@@ -4702,6 +4702,7 @@ more_data:
 				 !tx_desc->flags)) {
 				dp_tx_comp_info_rl("Descriptor freed in vdev_detach %d",
 						   tx_desc->id);
+				DP_STATS_INC(soc, tx.tx_comp_exception, 1);
 				continue;
 			}