staging: wlan-ng: Replace long int with long

Replace long int with long as int is unnecessary according to the
checkpatch.pl warning. K&R write, 'The word int can be omitted... and
typically is.'

Signed-off-by: Maya Nakamura <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/wlan-ng/p80211conv.c

···
 			/* A bogus length ethfrm has been sent. */
 			/* Is someone trying an oflow attack? */
 			netdev_err(netdev, "DIXII frame too large (%ld > %d)\n",
-				   (long int)(payload_length -
+				   (long)(payload_length -
 				   sizeof(struct wlan_llc) -
 				   sizeof(struct wlan_snap)), netdev->mtu);
 			return 1;