qcacmn: Add tx device limit

Add tx device limit configurable from INI.
This is used to limit the overall tx descriptors used in the device

Change-Id: I51e9611ca14bdc146de914317b38b98329130c9f

wlan_cfg/wlan_cfg.h

@@ -150,6 +150,7 @@ struct wlan_srng_cfg {
  * @tx_desc_limit_0: tx_desc limit for 5G H
  * @tx_desc_limit_1: tx_desc limit for 2G
  * @tx_desc_limit_2: tx_desc limit for 5G L
+ * @tx_device_limit: tx device limit
  * @tx_comp_loop_pkt_limit: Max # of packets to be processed in 1 tx comp loop
  * @rx_reap_loop_pkt_limit: Max # of packets to be processed in 1 rx reap loop
  * @rx_hp_oos_update_limit: Max # of HP OOS (out of sync) updates
@@ -234,6 +235,7 @@ struct wlan_cfg_dp_soc_ctxt {
 	int tx_desc_limit_0;
 	int tx_desc_limit_1;
 	int tx_desc_limit_2;
+	int tx_device_limit;
 #ifdef WLAN_FEATURE_RX_SOFTIRQ_TIME_LIMIT
 	uint32_t tx_comp_loop_pkt_limit;
 	uint32_t rx_reap_loop_pkt_limit;
@@ -1024,6 +1026,15 @@ wlan_cfg_get_dp_soc_tx_desc_limit_1(struct wlan_cfg_dp_soc_ctxt *cfg);
 int
 wlan_cfg_get_dp_soc_tx_desc_limit_2(struct wlan_cfg_dp_soc_ctxt *cfg);
 
+/*
+ * wlan_cfg_get_dp_soc_tx_device_limit - Get tx device limit
+ * @wlan_cfg_soc_ctx
+ *
+ * Return: tx device limit
+ */
+int
+wlan_cfg_get_dp_soc_tx_device_limit(struct wlan_cfg_dp_soc_ctxt *cfg);
+
 /*
  * wlan_cfg_get_dp_soc_rxdma_refill_ring_size - Get rxdma refill ring size
  * @wlan_cfg_soc_ctx