igb: Fix code comment

Recently added code comment was missing a space that is needed.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igb/igb_main.c

@@ -1978,7 +1978,7 @@ void igb_reset(struct igb_adapter *adapter)
 		}
 	}
 #endif
-	/*Re-establish EEE setting */
+	/* Re-establish EEE setting */
 	if (hw->phy.media_type == e1000_media_type_copper) {
 		switch (mac->type) {
 		case e1000_i350: