qcacld-3.0: Fix PS enable/disable command cache issue

Currently the driver caches the command which comes
for PS enable/disable and if the user disables the
command the API sme_ps_enable_disable cannot go
forward to enable/disable the command because
of the check for last user command cache to be disabled
or not.

Fix is to cache the command after the disable has
been sent to FW to avoid the scenario where the command
is not sent by host as the check to send the command failed.

Change-Id: Ibff459fa03aceaf6963735d22d30c54a488751f4
CRs-Fixed: 2582410

core/hdd/src/wlan_hdd_wext.c

@@ -4298,9 +4298,9 @@ static int hdd_we_set_power(struct hdd_adapter *adapter, int value)
 		return 0;
 	case 2:
 		/* Disable PowerSave */
-		sme_save_usr_ps_cfg(mac_handle, false);
 		sme_ps_enable_disable(mac_handle, adapter->vdev_id,
 				      SME_PS_DISABLE);
+		sme_save_usr_ps_cfg(mac_handle, false);
 		return 0;
 	case 3:
 		/* Enable UASPD */