qcacld-3.0: Disable power save with user configuration

Do not enable power save if the user configures the power save to
be disabled. And set the user power save configuration enabled
by default.

Change-Id: I7be3263888ddbe8302d941444b9751df73a4b165
CRs-Fixed: 2533757

core/sme/src/common/sme_power_save.c

@@ -346,6 +346,11 @@ QDF_STATUS sme_enable_sta_ps_check(struct mac_context *mac_ctx,
 		return QDF_STATUS_E_FAILURE;
 	}
 
+	if (!mac_ctx->usr_cfg_ps_enable) {
+		sme_debug("Cannot initiate PS. PS is disabled by usr(ioctl)");
+		return QDF_STATUS_E_FAILURE;
+	}
+
 	/* Check whether the given session is Infra and in Connected State
 	 * also if command is power save disable  there is not need to check
 	 * for connected state as firmware can handle this
@@ -806,6 +811,9 @@ QDF_STATUS sme_ps_open(mac_handle_t mac_handle)
 {
 
 	uint32_t i;
+	struct mac_context *mac_ctx = MAC_CONTEXT(mac_handle);
+
+	mac_ctx->usr_cfg_ps_enable = true;
 
 	for (i = 0; i < WLAN_MAX_VDEVS; i++) {
 		if (QDF_STATUS_SUCCESS != sme_ps_open_per_session(mac_handle,