L2SS-370: Configure the XST offload enable only when the header is configured correctly.

devices/devices/sdp/xst.py

@@ -75,6 +75,23 @@ class XST(Statistics):
         default_value=[[0,102,0,0,0,0,0,0]] * 16
     )
 
+    FPGA_xst_offload_enable_RW_default = device_property(
+        dtype='DevVarBooleanArray',
+        mandatory=False,
+        default_value=[True] * 16
+    )
+
+    first_default_settings = [
+        'FPGA_xst_offload_hdr_eth_destination_mac_RW',
+        'FPGA_xst_offload_hdr_ip_destination_address_RW',
+        'FPGA_xst_offload_hdr_udp_destination_port_RW',
+
+        'FPGA_xst_subband_select_RW',
+
+        # enable only after the offloading is configured correctly
+        'FPGA_xst_offload_enable_RW'
+    ]
+
     # ----------
     # Attributes
     # ----------