qcacmn: ini config to allocate special TX descriptors of pdev

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

CRs-Fixed: 3343209
Change-Id: I6578bddd1f4ea07528c9f66f778b113ec6fb9e61

wlan_cfg/wlan_cfg.c

@@ -2863,6 +2863,7 @@ wlan_cfg_soc_attach(struct cdp_ctrl_objmgr_psoc *psoc)
 	wlan_cfg_ctx->num_tx_ext_desc_pool = cfg_get(psoc,
 						     CFG_DP_TX_EXT_DESC_POOLS);
 	wlan_cfg_ctx->num_tx_desc = cfg_get(psoc, CFG_DP_TX_DESC);
+	wlan_cfg_ctx->num_tx_spl_desc = cfg_get(psoc, CFG_DP_TX_SPL_DESC);
 	wlan_cfg_ctx->min_tx_desc = WLAN_CFG_NUM_TX_DESC_MIN;
 	wlan_cfg_ctx->num_tx_ext_desc = cfg_get(psoc, CFG_DP_TX_EXT_DESC);
 	wlan_cfg_ctx->htt_packet_type = cfg_get(psoc, CFG_DP_HTT_PACKET_TYPE);
@@ -3526,6 +3527,11 @@ int wlan_cfg_get_num_tx_desc(struct wlan_cfg_dp_soc_ctxt *cfg)
 	return cfg->num_tx_desc;
 }
 
+int wlan_cfg_get_num_tx_spl_desc(struct wlan_cfg_dp_soc_ctxt *cfg)
+{
+	return cfg->num_tx_spl_desc;
+}
+
 void wlan_cfg_set_num_tx_desc(struct wlan_cfg_dp_soc_ctxt *cfg, int num_desc)
 {
 	cfg->num_tx_desc = num_desc;