qcacld-3.0: Code refine for SSDP and DTIM config

1) 'ssdp' in t_wma_handle structure is not used anymore,
   remove this redundant field.
2) ucfg_pmo_set_sta_mod_dtim and ucfg_pmo_get_sta_mod_dtim
   should have been accessing 'sta_mod_dtim' instead of
   'sta_dynamic_dtim' in struct pmo_psoc_cfg.

Change-Id: Iedd7bed1c9f637a819f97b6d8c687b784739dd62
CRs-Fixed: 2415087

core/wma/inc/wma.h

@@ -1018,7 +1018,6 @@ struct wma_wlm_stats_data {
  * @get_sta_peer_info: Is a "get peer info" request active?
  * @peer_macaddr: When @get_one_peer_info is true, the peer's mac address
  * @thermal_mgmt_info: Thermal mitigation related info
- * @ssdp: ssdp flag
  * @enable_mc_list: To Check if Multicast list filtering is enabled in FW
  * @ibss_started: is IBSS started or not
  * @ibsskey_info: IBSS key info
@@ -1155,7 +1154,6 @@ typedef struct {
 	bool get_sta_peer_info;
 	struct qdf_mac_addr peer_macaddr;
 	t_thermal_mgmt thermal_mgmt_info;
-	bool ssdp;
 	bool enable_mc_list;
 	uint8_t ibss_started;
 	tSetBssKeyParams ibsskey_info;