qca-wifi: Drop ppdu descriptor in pending ppdu queue and other fix

a. ppdu desc in pending ppdu queue is dropped on queue length exceeds
threshold which is 32.
b. configuring ring map for soc only once.

Change-Id: I7398a478ce9e4d974d9ecc2a06d30821f151a1b5

dp/wifi3.0/dp_tx_capture.h

@@ -66,6 +66,7 @@ struct dp_pdev_tx_capture {
 	uint32_t last_msdu_id;
 	qdf_event_t miss_ppdu_event;
 	uint32_t ppdu_dropped;
+	uint32_t pend_ppdu_dropped;
 	qdf_nbuf_queue_t ctl_mgmt_q[TXCAP_MAX_TYPE][TXCAP_MAX_SUBTYPE];
 	qdf_nbuf_queue_t retries_ctl_mgmt_q[TXCAP_MAX_TYPE][TXCAP_MAX_SUBTYPE];
 	qdf_spinlock_t ctl_mgmt_lock[TXCAP_MAX_TYPE][TXCAP_MAX_SUBTYPE];