e1000e: use true/false for boolean send_xon, do not assume always true

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 56c1aec..8b62870 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -3464,7 +3464,7 @@
 		fc->pause_time = 0xFFFF;
 	else
 		fc->pause_time = E1000_FC_PAUSE_TIME;
-	fc->send_xon = 1;
+	fc->send_xon = true;
 	fc->current_mode = fc->requested_mode;
 
 	switch (hw->mac.type) {