i40e: trivial: fix missing space

Missing space in comment, fixed.

Change-ID: I8cdf3ce5994b4a97dcc3eeb33422533918546667
Reported-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -3754,7 +3754,7 @@ static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
 
 #ifdef CONFIG_NET_POLL_CONTROLLER
 /**
- * i40e_netpoll - A Polling 'interrupt'handler
+ * i40e_netpoll - A Polling 'interrupt' handler
  * @netdev: network interface device structure
  *
  * This is used by netconsole to send skbs without having to re-enable