qcacmn: ini config to allocate special TX descriptors of SOC

An INI dp_tx_spl_device_limit is defined and can be used to configure the
limit of TX descriptors that can reserved on the SOC to handle
special frames like EAPOL.

CRs-Fixed: 3343207
Change-Id: Ic84a11249880a3541749a72ac6d60df548f2bc5c

wlan_cfg/wlan_cfg.c

@@ -2969,6 +2969,8 @@ wlan_cfg_soc_attach(struct cdp_ctrl_objmgr_psoc *psoc)
 						CFG_DP_TX_DESC_LIMIT_2);
 	wlan_cfg_ctx->tx_device_limit = cfg_get(psoc,
 						CFG_DP_TX_DEVICE_LIMIT);
+	wlan_cfg_ctx->tx_spl_device_limit = cfg_get(psoc,
+						    CFG_DP_TX_SPL_DEVICE_LIMIT);
 	wlan_cfg_ctx->tx_sw_internode_queue = cfg_get(psoc,
 						CFG_DP_TX_SW_INTERNODE_QUEUE);
 	wlan_cfg_ctx->rxdma_err_dst_ring = cfg_get(psoc,
@@ -3807,6 +3809,12 @@ 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_tx_spl_device_limit(struct wlan_cfg_dp_soc_ctxt *cfg)
+{
+	return cfg->tx_spl_device_limit;
+}
+
 int
 wlan_cfg_get_dp_soc_tx_sw_internode_queue(struct wlan_cfg_dp_soc_ctxt *cfg)
 {