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.c

@@ -406,6 +406,8 @@ wlan_cfg_soc_attach(struct cdp_ctrl_objmgr_psoc *psoc)
 						CFG_DP_TX_DESC_LIMIT_1);
 	wlan_cfg_ctx->tx_desc_limit_2 = cfg_get(psoc,
 						CFG_DP_TX_DESC_LIMIT_2);
+	wlan_cfg_ctx->tx_device_limit = cfg_get(psoc,
+						CFG_DP_TX_DEVICE_LIMIT);
 	wlan_cfg_ctx->rxdma_err_dst_ring = cfg_get(psoc,
 						   CFG_DP_RXDMA_ERR_DST_RING);
 	wlan_cfg_ctx->enable_data_stall_detection =
@@ -956,6 +958,12 @@ wlan_cfg_get_dp_soc_tx_desc_limit_2(struct wlan_cfg_dp_soc_ctxt *cfg)
 	return cfg->tx_desc_limit_2;
 }
 
+int
+wlan_cfg_get_dp_soc_tx_device_limit(struct wlan_cfg_dp_soc_ctxt *cfg)
+{
+	return cfg->tx_device_limit;
+}
+
 int
 wlan_cfg_get_dp_soc_rxdma_err_dst_ring_size(struct wlan_cfg_dp_soc_ctxt *cfg)
 {