qcacmn: dump reo ring when flush cache failed

When delete peer, host will try to flush all frames in REO queue
by sending a cmd through reo ring, but sometimes encounted failure to
send this cmd, dump ring status if ecountered above failure.

Change-Id: I3ea4e96e5999f85398b531ddf4f350e91e798d70
CRs-Fixed: 2167419

hal/wifi3.0/hal_reo.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2018 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -192,6 +192,7 @@ inline int hal_reo_cmd_flush_cache(void *reo_ring, struct hal_soc *soc,
 		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
 			"%s: Out of cmd ring entries\n", __func__);
 		hal_srng_access_end(soc, reo_ring);
+		hal_srng_dump(reo_ring);
 		return -EBUSY;
 	}